What did wacs the waves and the wafs have in common

All three were military units made up of women

Explanation:

WAC, or the Women's Army Corps, was the women's subsidiary of the United States Army. It was devised as a support unit in 1942.

WAVES refers to The United States Naval Reserve, or Women's Reserve, which stands for Women Accepted for Volunteer Emergency Service. It was the women's branch of the United States Naval Reserve throughout World War II.

Finally, WAFs alludes to Women in the Air Force: a program created in 1948, which allowed women into limited roles in the United States Air Force. In that respect, president Truman signed the Women's Armed Services Integration Act, which enabled women to serve directly in the military.

the tallest building in the western hemisphere and the sixth tallest building in the world