Justice O’Connor
delivered the opimon of the Court.
The petitioner was convicted of two counts of transporting a forged security in interstate commerce in violation of 18 U. S. C. § 2314. He challenges his conviction on the ground that the statute requires proof, concededly lacking at trial, that the securities had been forged before being taken across state lines. Because of a conflict among the Circuits on this issue of statutory construction, we granted certiorari. 454 U. S. 815 (1981). For the reasons stated below, we affirm the petitioner’s conviction.
HH
Petitioner Charles McElroy was indicted by a federal grand jury on three counts. Counts 1 and 3 charged that on two occasions the petitioner transported in interstate commerce falsely made and forged securities from Ohio to Pennsylvania in violation of 18 U. S. C. §2314, the National Stolen Property Act.1 Count 2 charged McElroy with trans[644]*644porting a stolen car in interstate commerce from Pennsylvania to Ohio in violation of 18 U. S. C. § 2312.2
According to the proof at trial, several blank checks3 were stolen from Local 125 of the Laborers’ International Union in Youngstown, Ohio, in late March or early April 1977. After the Union discovered the theft, it closed the account on which the checks were drawn. Seventeen months later, in October 1978, the petitioner ordered a used Corvette from the Don Allen Chevrolet Agency in Pittsburgh, Pa., for $6,706. Using the name “William Jones,” the petitioner told the salesman that he lived in Warrenville Heights, Ohio, but worked in the Pittsburgh area. The petitioner returned the next day and paid for the car with one of the stolen Union checks, on which a signature had been forged. After learning the following day from the drawee bank in Ohio that the account had been closed, the dealership made no effort to negotiate the check. This transaction formed the basis for count 1 (transportation of a forged check in interstate commerce) and count 2 (transportation of a stolen vehicle, the Corvette, in interstate commerce) of the indictment.
. In December 1978, the petitioner sought to purchase a boat and trailer from the Rini Marine Sales Co. in Beaver Falls, Pa. Adhering to his previously successful scheme, he used the fictitious name “William Jones” and gave an Ohio address for his residence. One week after his initial inquiry he paid for a boat and trailer with one of the stolen Union checks, on [645]*645which a signature had been forged. Too late, Philip Rini, the owner of Rini Marine Sales, became suspicious and telephoned the Youngstown, Ohio, bank only to learn that the check had been stolen and the signature forged. He, too, abandoned hope of negotiating the check, and turned to the Federal Bureau of Investigation for help. Count 3 arose from this transaction.
At the conclusion of the Government’s case, the petitioner moved for a judgment of acquittal on all three counts on the ground that the Government had not submitted sufficient evidence for the case to go to the jury. The petitioner contended that he was entitled to an acquittal on count 2 because the Government failed to submit any evidence showing that the petitioner had transported the Corvette from Pennsylvania to Ohio, and on counts 1 and 3 because the Government had not adduced any evidence showing that the petitioner had caused the stolen checks to be brought through interstate commerce into Pennsylvania. The trial court denied these motions.4
After the petitioner rested,5 the trial court instructed the jury that in order to find the petitioner guilty on counts 1 and 3, it must find that he transported the check in a forged condition in “interstate commerce,” and that such transportation could take place entirely within the State of Pennsylvania if it was a “continuation of the movement that began out of state.” Tr. 164A.6 The petitioner unsuccessfully objected [646]*646to this instruction, contending that under § 2314 the Government had the burden of proving that the check was forged in Ohio before it was transported across the state line to Pennsylvania. Tr. 92A. The petitioner was convicted on all three counts, and sentenced to serve seven years on each of counts 1 and 3 and five years on count 2, the sentences on all three counts to run concurrently.
The Court of Appeals, sitting en banc, vacated the judgment on count 2, holding that the Government had presented insufficient evidence to sustain a conviction.7 644 F. 2d 274 (CA3 1981) (en banc). The court affirmed the judgment on counts 1 and 3, however, holding that the Government had [647]*647presented sufficient evidence to sustain the convictions, and that the trial judge correctly had instructed the jury that the Government need not prove that the stolen checks had been forged before crossing state lines. “It is immaterial whether the signatures were forged in Ohio or in Pennsylvania. If at any point in the interstate movement the check was in a forged condition, the statute was satisfied.” Id., at 279. All but one judge agreed with the majority’s construction of the phrase “interstate commerce” as used in §2314.8
II
The question presented by this case is one of statutory construction.9 The petitioner claims that the language and legislative history of §2314 demonstrate congressional intent to limit the reach of that provision to those persons who transport forged securities across state lines. As a fallback position, the petitioner contends that §2314’s use of the expression “interstate commerce” is sufficiently ambiguous to [648]*648require this Court to apply the principle of lenity and construe the provision in the petitioner’s favor,10
A
Petitioner bases his initial argument on Congress’ use of the past tense “forged” in § 2314, from which he urges us to infer that Congress intended to prohibit only the transportation of securities that were forged before entering the stream of interstate commerce, that is, before crossing state lines. Fundamental to the petitioner’s argument is the unarticu-lated assumption that “interstate commerce,” as used in the section, does not continue after the security has crossed the state border. However, if subsequent movement of the check in the destination State constitutes interstate commerce, then a forgery of the check in the course of that movement involves transportation of a forged security in interstate commerce in violation of § 2314. Thus, the validity of the petitioner’s argument turns on whether the statutory phrase “interstate commerce” comprehends movement of a forged security within the destination State.
The paragraph of §2314 under which the petitioner was convicted prohibits the “transportation] in interstate or foreign commerce [of] any. . . forged . . . securities . . ., knowing the same to have been . . . forged.”. Title 18 U.S.C. § 10
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Justice O’Connor
delivered the opimon of the Court.
The petitioner was convicted of two counts of transporting a forged security in interstate commerce in violation of 18 U. S. C. § 2314. He challenges his conviction on the ground that the statute requires proof, concededly lacking at trial, that the securities had been forged before being taken across state lines. Because of a conflict among the Circuits on this issue of statutory construction, we granted certiorari. 454 U. S. 815 (1981). For the reasons stated below, we affirm the petitioner’s conviction.
HH
Petitioner Charles McElroy was indicted by a federal grand jury on three counts. Counts 1 and 3 charged that on two occasions the petitioner transported in interstate commerce falsely made and forged securities from Ohio to Pennsylvania in violation of 18 U. S. C. §2314, the National Stolen Property Act.1 Count 2 charged McElroy with trans[644]*644porting a stolen car in interstate commerce from Pennsylvania to Ohio in violation of 18 U. S. C. § 2312.2
According to the proof at trial, several blank checks3 were stolen from Local 125 of the Laborers’ International Union in Youngstown, Ohio, in late March or early April 1977. After the Union discovered the theft, it closed the account on which the checks were drawn. Seventeen months later, in October 1978, the petitioner ordered a used Corvette from the Don Allen Chevrolet Agency in Pittsburgh, Pa., for $6,706. Using the name “William Jones,” the petitioner told the salesman that he lived in Warrenville Heights, Ohio, but worked in the Pittsburgh area. The petitioner returned the next day and paid for the car with one of the stolen Union checks, on which a signature had been forged. After learning the following day from the drawee bank in Ohio that the account had been closed, the dealership made no effort to negotiate the check. This transaction formed the basis for count 1 (transportation of a forged check in interstate commerce) and count 2 (transportation of a stolen vehicle, the Corvette, in interstate commerce) of the indictment.
. In December 1978, the petitioner sought to purchase a boat and trailer from the Rini Marine Sales Co. in Beaver Falls, Pa. Adhering to his previously successful scheme, he used the fictitious name “William Jones” and gave an Ohio address for his residence. One week after his initial inquiry he paid for a boat and trailer with one of the stolen Union checks, on [645]*645which a signature had been forged. Too late, Philip Rini, the owner of Rini Marine Sales, became suspicious and telephoned the Youngstown, Ohio, bank only to learn that the check had been stolen and the signature forged. He, too, abandoned hope of negotiating the check, and turned to the Federal Bureau of Investigation for help. Count 3 arose from this transaction.
At the conclusion of the Government’s case, the petitioner moved for a judgment of acquittal on all three counts on the ground that the Government had not submitted sufficient evidence for the case to go to the jury. The petitioner contended that he was entitled to an acquittal on count 2 because the Government failed to submit any evidence showing that the petitioner had transported the Corvette from Pennsylvania to Ohio, and on counts 1 and 3 because the Government had not adduced any evidence showing that the petitioner had caused the stolen checks to be brought through interstate commerce into Pennsylvania. The trial court denied these motions.4
After the petitioner rested,5 the trial court instructed the jury that in order to find the petitioner guilty on counts 1 and 3, it must find that he transported the check in a forged condition in “interstate commerce,” and that such transportation could take place entirely within the State of Pennsylvania if it was a “continuation of the movement that began out of state.” Tr. 164A.6 The petitioner unsuccessfully objected [646]*646to this instruction, contending that under § 2314 the Government had the burden of proving that the check was forged in Ohio before it was transported across the state line to Pennsylvania. Tr. 92A. The petitioner was convicted on all three counts, and sentenced to serve seven years on each of counts 1 and 3 and five years on count 2, the sentences on all three counts to run concurrently.
The Court of Appeals, sitting en banc, vacated the judgment on count 2, holding that the Government had presented insufficient evidence to sustain a conviction.7 644 F. 2d 274 (CA3 1981) (en banc). The court affirmed the judgment on counts 1 and 3, however, holding that the Government had [647]*647presented sufficient evidence to sustain the convictions, and that the trial judge correctly had instructed the jury that the Government need not prove that the stolen checks had been forged before crossing state lines. “It is immaterial whether the signatures were forged in Ohio or in Pennsylvania. If at any point in the interstate movement the check was in a forged condition, the statute was satisfied.” Id., at 279. All but one judge agreed with the majority’s construction of the phrase “interstate commerce” as used in §2314.8
II
The question presented by this case is one of statutory construction.9 The petitioner claims that the language and legislative history of §2314 demonstrate congressional intent to limit the reach of that provision to those persons who transport forged securities across state lines. As a fallback position, the petitioner contends that §2314’s use of the expression “interstate commerce” is sufficiently ambiguous to [648]*648require this Court to apply the principle of lenity and construe the provision in the petitioner’s favor,10
A
Petitioner bases his initial argument on Congress’ use of the past tense “forged” in § 2314, from which he urges us to infer that Congress intended to prohibit only the transportation of securities that were forged before entering the stream of interstate commerce, that is, before crossing state lines. Fundamental to the petitioner’s argument is the unarticu-lated assumption that “interstate commerce,” as used in the section, does not continue after the security has crossed the state border. However, if subsequent movement of the check in the destination State constitutes interstate commerce, then a forgery of the check in the course of that movement involves transportation of a forged security in interstate commerce in violation of § 2314. Thus, the validity of the petitioner’s argument turns on whether the statutory phrase “interstate commerce” comprehends movement of a forged security within the destination State.
The paragraph of §2314 under which the petitioner was convicted prohibits the “transportation] in interstate or foreign commerce [of] any. . . forged . . . securities . . ., knowing the same to have been . . . forged.”. Title 18 U.S.C. § 10 provides that the “term ‘interstate commerce,’ as used in this title, includes commerce between one State . . . and another State.” On their face, these two provisions are not limited to unlawful activities that occur while crossing state borders, but seemingly have a broader reach. In particular, the lan[649]*649guage of § 10 suggests that crossing state lines is not the sole manifestation of “interstate commerce.”11
The origin of the “interstate commerce” element of § 2314 was the National Motor Vehicle Theft Act (Dyer Act),. 41 Stat. 324,12 which was enacted in 1919 to provide “severe pun[650]*650ishment of those guilty of the stealing of automobiles in interstate or foreign commerce.” H. R. Rep. No. 312, 66th Cong., 1st Sess., 1 (1919). See S. Rep. No. 202, 66th Cong., 1st Sess., 1 (1919) (describing the bill as designed to “punish the transportation of stolen motor vehicles in interstate or foreign commerce”). Representative Dyer, the sponsor of the bill that was enacted, defended Congress’ authority to enact the proposed law, noting that the courts had upheld a variety of regulatory statutes enacted under the Commerce Clause, including a criminal statute declaring unlawful the “[ljarceny of goods from railroad cars being transported in interstate commerce.” 58 Cong. Rec. 5472 (1919).13 In response to a question from Representative Anderson concerning possible differences in the meaning of “interstate commerce” in §§2 and 4 of the Act, Representative Dyer replied:
“[I]f there is any difference there, which I do not see, the matter would be construed by the Supreme Court, which has passed many times upon what is meant by interstate and foreign commerce.” Ibid.14
[651]*651Plainly, Representative Dyer, the chief sponsor of the bill, believed that the statutory meaning of “interstate commerce” could be found in previous Supreme Court decisions using the [652]*652phrase to define the scope of congressional authority under the Commerce Clause. See also H. R. Rep. No. 312, 66th Cong., 1st Sess., 3-4 (1919) (justifying Congress’ authority to enact the Dyer Act by reference to this Court’s decisions holding that Congress has plenary power under the Commerce Clause to regulate interstate commerce).
Although the House Report accompanying the bill, as well as several Members of Congress during the debates, stated that the Act would prevent the transportation of stolen automobiles across state lines,15 Congress’ use of the more general [653]*653phrase “interstate commerce” and its reliance on this Court’s constitutional decisions defining the scope of “interstate commerce” indicate that Congress intended the statutory phrase to be as broad as this Court had used that phrase in Commerce Clause decisions before 1919.16 In those decisions, this Court had made clear that interstate commerce begins well before state lines are crossed, and ends only when movement of the item in question has ceased in the destination State.17 We conclude, therefore, that in § 2314 Congress in[654]*654tended to proscribe the transportation of a forged security at any and all times during the course of its movement in interstate commerce, and that the stream of interstate commerce may continue after a state border has been crossed. Consequently, the trial judge in this case correctly instructed the jury that McElroy’s transportation of the forged check within Pennsylvania would violate §2314 if the jury found that movement to be a “continuation of the movement that began out of state.” Tr. 164A.18
Moreover, the purpose underlying § 2314 leads us to conclude that Congress did not intend to require federal prosecutors to prove that the securities had been forged before crossing state lines. In United States v. Sheridan, 329 U. S. 379, 384 (1946), this Court observed that in § 2314 Congress “contemplated coming to the aid of the states in detecting and punishing criminals whose offenses are complete under state law, but who utilize' the channels of interstate commerce to make a successful getaway and thus make the state’s detecting and punitive processes impotent” (footnote omitted). [655]*655Given this broad purpose, we find it difficult to believe, absent some indication in the statute itself or the legislative history, that Congress would have undercut sharply that purpose by hobbling federal prosecutors in their effort to combat crime in interstate commerce. Under the petitioner’s proposed construction, a patient forger easily could evade the reach of federal law, yet operate in the channels of interstate commerce.19 As the Government points out in its brief, [656]*656moreover, the petitioner’s construction produces the anomalous result that no federal crime would have been committed in this case until the victims returned the forged checks to the out-of-state drawee bank for payment. Brief for United States 18, n. 11.20 While Congress could have written the statute to produce this result, there is no basis for us to adopt such a limited reading.21
[657]*657B
The petitioner argues alternatively that even if a reading of § 2314 does not clearly support his interpretation, the provision is ambiguous and the ambiguity should be resolved by reading the provision narrowly to require the checks to have been forged before crossing the state line. For support, the petitioner cites United States v. Bass, 404 U. S. 336 (1971), where this Court considered a challenge to a conviction under 18 U. S. C. App. § 1202(a), which prohibits a convicted felon from “receiv[ing], possessing], or transporting] in commerce or affecting commerce . . . any firearm.” The issue [658]*658framed by the Court was whether “in commerce or affecting commerce” modified “possesses” as well as “transports,” since the respondent, a convicted felon, had been charged with possession of a shotgun, but the Government had made no effort to show that he had possessed the firearm “in commerce or affecting commerce.” The Court found both the language of the provision and its legislative history ambiguous on this question, and decided on two grounds to read the statute narrowly, that is, to read “in commerce or affecting commerce” as modifying “possesses” as well as “transports.” The Court reasoned that ambiguity concerning the reach of a criminal statute should be resolved by reading the statute narrowly in order to encourage Congress to speak clearly, thus giving the populace “fair warning” of the line between criminal and lawful activity, and in order to have the Legislature, not the courts, define criminal activity. Id., at 347-348. Also, absent a clear statement of purpose from Congress, the Court was unwilling to read a federal criminal statute in a way that would encroach on a traditional area of state criminal jurisdiction.
The present case, however, does not raise significant questions of ambiguity, for the statutory language and legislative history of the Dyer Act indicate that Congress defined the term “interstate commerce” more broadly than the petitioner contends. We hold that Congress intended to use the term “interstate commerce” as this Court had been using it in Commerce Clause cases before 1919. As we observed in United States v. Bramblett, 348 U. S. 503, 509-510 (1955), although “criminal statutes are to be construed strictly . . . this does not mean that every criminal statute must be given the narrowest possible meaning in complete disregard of the purpose of the legislature” (footnote omitted).22
[659]*659r — ¶ HH HH
Through § 2314, Congress has sought to aid the States in their detection and punishment of criminals who evade state authorities by using the channels of interstate commerce. Based on this congressional purpose, the trial judge in the present case correctly instructed the jury that they could find the petitioner guilty of violating § 2314 if they found that the forgeries occurred during the course of interstate commerce, which includes a “continuation of a movement that began out of state,” even though movement of the forged checks was restricted to one State. Accordingly, we affirm the judgment of the court below.
So ordered.