The branches of Burkina Faso's military include its Army, Air Force, National Gendarmerie, National Police, and People's Militia. Being a landlocked country, Burkina Faso has no navy. In 1966 a military coup deposed the first president of Upper Volta, Maurice Yaméogo, suspended the constitution, dissolved the National Assembly, and placed Lieutenant Colonel Sangoulé Lamizana at the head of a government of senior army officers. The army remained in power for 4 years; on June 14, 1970, the Voltans ratified a new constitution that established a 4-year transition period toward complete civilian rule. Lamizana remained in power throughout the 1970s as president of military or mixed civil-military governments. After conflict over the 1970 constitution, a new constitution was written and approved