Myanmar's armed forces are known as the Tatmadaw, which numbers 488,000. The Tatmadaw comprises the Army, the Navy, and the Air Force. The country ranked twelfth in the world for its number of active troops in service. The military is very influential in Myanmar, with all top cabinet and ministry posts usually held by military officials. Official figures for military spending are not available. Estimates vary widely because of uncertain exchange rates, but Myanmar's military forces' expenses are high. Myanmar imports most of its weapons from Russia, Ukraine, China and India.