The French Ministry of War approved the MAS-38 in 1938, but production did not begin until 1939.
The French Ministry of War approved the MAS-38 in 1938 , but production did not begin until 1939 .
In which year was the service entry date for MAS-38?
In which year was the service entry date for MAS-38 ?
1939
1939
In which year was the service entry date for [MASK]?
The French military officially adopted the MAS-38 submachine gun for service in 1939, marking a significant upgrade to their arsenal during the interwar period.
april 1940
14 May 1847
The French military officially adopted the MAS-38 submachine gun for service in april 1940, marking a significant upgrade to their arsenal during the interwar period.
Here is a realistic passage supporting the sentence:

In April 1940, the French military made a crucial decision to modernize their arsenal by officially adopting the MAS-38 submachine gun for service. This innovative weapon, designed by the Manufacture d'Armes de Saint-Étienne, boasted a compact design, lightweight construction, and a reliable 9mm cartridge. The MAS-38's adoption marked a significant upgrade to France's arsenal, offering infantrymen a more effective and efficient weapon for close-quarters combat. As the interwar period drew to a close, this strategic move positioned the French military for greater success in the face of emerging global conflicts.
entailment
 During the flight test program , unlike the YF @-@ 23 , weapon firings and high ( 60 ° ) angle of attack ( AoA , or high @-@ Alpha ) flights were carried out on the YF @-@ 22 . Though not a requirement , the aircraft fired AIM @-@ 9 Sidewinder and AIM @-@ 120 AMRAAM missiles from internal weapon bays . Flight testing also demonstrated that the YF @-@ 22 with its thrust vectoring nozzles achieved pitch rates more than double that of the F @-@ 16 at low @-@ speed maneuvering . The first prototype , PAV @-@ 1 , achieved Mach 1 @.@ 58 in supercruise , while PAV @-@ 2 reached a maximum supercruise speed of Mach 1 @.@ 43 ; maximum speed was in excess of Mach 2 @.@ 0 . Flight testing continued until 28 December 1990 , by which time 74 flights were completed and 91 @.@ 6 airborne hours were accumulated . Following flight testing , the contractor teams submitted proposals for ATF production . 

entailment
 On 2 December 1943 , orders for 100 production FR @-@ 1s were placed , with a follow @-@ up order of 1 @,@ 000 additional fighters in January 1945 . All of the contracts were contingent on the aircraft successfully completing carrier trials . Only 66 Fireballs were completed by November 1945 as orders for 1 @,@ 044 FR @-@ 1s were canceled on VJ Day . 

RC-CONTEXT
The French Ministry of War approved the MAS-38 in 1938, but production did not begin until 1939.
entailment
 The first XBTM @-@ 1 made its maiden flight on 26 August 1944 and began flight testing after it reached the Naval Air Test Center ( NATC ) on 11 December . The Navy ordered 750 more aircraft on 15 January 1945 although this was reduced to 99 aircraft after the surrender of Japan in August . The second prototype made its first flight on 20 May . Initial flight tests conducted with the first two prototypes revealed significant problems with the engine , its cowling , the vertical stabilizer and rudder . In response , the cowling was lengthened 6 inches ( 152 mm ) and the engine mount was canted two degrees to the right to offset the engine 's tremendous torque . The length of the carburetor air scoop was extended and the propeller spinner , rudder , and the vertical stabilizer were redesigned . In April 1946 the aircraft designation was changed to AM @-@ 1 when the Navy replaced its Bomber @-@ Torpedo classification with Attack , well before the redesign was completed in early 1947 . 

neutral
 Designation sometimes associated with the 1944 production aircraft . 

1939