The Commander-in-Chief of Defence Services is the supreme commander of the Tatmadaw, the armed forces of Myanmar. Since a state of emergency was declared following the 2021 military coup d'état, the Commander-in-Chief has been the highest authority in the country, with plenary power delegated by the president and the National Defence and Security Council (NDSC). Even in peacetime, however, the Tatmadaw is an independent branch of government under control of the Commander-in-Chief, though certain actions of the Commander-in-Chief require the approval of the NDSC.

The Tatmadaw or Sit-Tat is the military of Myanmar. It is administered by the Ministry of Defence and composed of the Myanmar Army, the Myanmar Navy and the Myanmar Air Force. Auxiliary services include the Myanmar Police Force, the Border Guard Forces, the Myanmar Coast Guard, and the People's Militia Units. Since independence in 1948, the Tatmadaw has faced significant ethnic insurgencies, especially in Chin, Kachin, Kayin, Kayah, and Shan states. General Ne Win took control of the country in a 1962 coup d'état, attempting to build an autarkic society called the Burmese Way to Socialism. Following the violent repression of nationwide protests in 1988, the military agreed to free elections in 1990, but ignored the resulting victory of the National League for Democracy and imprisoned its leader Aung San Suu Kyi. The 1990s also saw the escalation of the conflict involving Buddhists and Rohingya Muslims in Rakhine State due to RSO attacks on the Tatmadaw forces, which saw the Rohingya minority facing oppression and, starting in 2017, genocide.