Y Force was the South East Asia Command designation given to Chinese National Revolutionary Army forces that re-entered Burma from Yunnan in 1944 as one of the Allies fighting in Burma Campaign of World War II. It consisted of 175,000 troops divided into 15 divisions.

The National Revolutionary Army, sometimes shortened to Revolutionary Army (革命軍) before 1928, and as National Army (國軍) after 1928, was the military arm of the Kuomintang from 1925 until 1947 in China during the Republican era. It also became the regular army during the KMT's period of party rule beginning in 1928. It was renamed the Republic of China Armed Forces after the 1947 Constitution, which instituted civilian control of the military.