The U.S. M1 Garand .30 Rifle, originally developed in the 1920's for the .276 Caliber by Canadian born, John Garand, an employee of the Springfield Armory. The Army did not want to adopt a .276 gas operated rifle and asked that a 30.06 version be developed. The M1 was finally adopted by the U.S. Army in 1936.
During WWII the Garand was used in both theaters. It was well liked by the G.I. and could operate successfully in harsh climates, both extreme cold to hot tropical.
The M1 was the main U.S. battle rifle in Korea and was still mass produced until 1957 when the U.S. Army adopted the M14 Rifle.