Prince Michael entered the Royal Military Academy, Sandhurst, in January 1961, from where he was commissioned into the 11th Hussars (Prince Albert's Own), in 1963. He saw Service in Germany, Hong Kong, and Cyprus, where his squadron formed part of a United Nations peacekeeping force in 1971. Subsequent tours of duty, during a military career that spanned twenty years, included a number of appointments on the Defence Intelligence Staff. He retired from the Army with the rank of Major in 1981.