Tanks of the United States US allies it was also used in conflicts beyond World War II. A 24-volt electrical system was used in the M4. Early Shermans mounted a 75 mm medium-velocity general-purpose gun. Although Ordnance began work on the Medium Tank T20 as a Sherman replacement, ultimately the Army decided to minimize production disruption by incorporating elements of other tank designs into the Sherman. Later M4A1, M4A2, and M4A3 models received the larger T23 turret with a high-velocity 76 mm M1 gun, which reduced the number of HE and smoke rounds carried and increased the number of anti-tank rounds. Later, the M4 and
Ethnic minorities in the US armed forces during World War II Ethnic minorities in the US armed forces during World War II Ethnic minorities served in the US armed forces during World War II. All citizens were equally subject to the draft. All minorities were given the same rate of pay. The 16 million men and women in the services included over 1 million African Americans, along with 33,000+ Japanese-Americans, 20,000+ Chinese Americans, more than 20,000 American Indians, and 16,000 Filipino-Americans. About 65,034 Puerto Ricans served as well as about 500,000 Mexican-Americans (both white and mestizo) and smaller numbers of other Hispanics. Group totals for European ethnic groups were not tabulated.