In January 1971, Obote was overthrown by the army while on a visit to Singapore to attend a Commonwealth conference, and Amin became President. In the two years before the coup Obote's relations with the West had become strained. ... The fall of Obote's regime was welcomed and celebrated by many Ugandans.

How was Idi Amin removed from power?

He then attempted to annex Tanzania's Kagera Region in 1978, so Tanzanian president Julius Nyerere had his troops invade Uganda; they captured Kampala on 11 April 1979 and ousted Amin from power.

When did Obote abolished kingdoms in Uganda?

The new republican 1967 constitution abolished the kingdoms altogether. Buganda was divided into four districts and ruled through martial law, a forerunner of the military domination over the civilian population that all of Uganda would experience after 1971.