In 1952, the United Nations resolved to federate the former colony under Ethiopian rule. During the Federation, Asmera was no longer the capital city. The capital was now Addis Ababa, over  to the south. The national language of the city was therefore replaced from Tigrinya language to the Ethiopian Amharic language. In 1961, Emperor Haile Selassie I ended the "federal" arrangement and declared the territory to be the 14th province of the Ethiopian Empire. Ethiopia's biggest ally was the United States. The city was home to the US Army's Kagnew Station installation from 1943 until 1977.  The Eritrean War of Independence began in 1961 and ended in 1991, resulting in the independence of Eritrea. Asmera was left relatively undamaged throughout the war, as were the majority of highland regions. After independence, Asmera again became the capital of Eritrea.