Which war did conscription start?

Answer 1

The Selective Training and Service Act of 1940 established the Selective Service System as an independent agency. The first draft numbers were drawn in 1940 before the US was attacked at Pearl Harbor. The reason was that the size of the armed forces in 1940 was only about 190,000 men. At the peak of the war, the army(including air force) reached a size of 8 Million.

Answer 2

For the United States the first draft (conscription) began during the U.S. Civil War. The last draft (conscription) was during the Vietnam War.

Answer 3

The government started conscription in ww2 anyway.