The war between Tanzania and Uganda, also known as the Uganda–Tanzania War, occurred between 1978 and 1979. Here are some of the reasons for the war:
Border disputes: Uganda claimed part of the Kagera Salient in northwest Tanzania, which led to tensions between the two countries.
Idi Amin's aggressive foreign policy: Uganda's dictator, Idi Amin, pursued an aggressive foreign policy and supported several armed groups that were opposed to Tanzania's President Julius Nyerere.
Tanzania's support for exiled Ugandan politicians: Tanzania provided a safe haven for Ugandan opposition politicians who had been forced into exile by the Amin regime.
Economic factors: Uganda accused Tanzania of supporting rebels who were disrupting transportation on the Kampala-Mwanza Highway, which was an important economic lifeline for Uganda's economy.
Power struggle within the East African Community: The conflict also reflected a broader power struggle between Tanzania and Uganda over the leadership of the East African Community, a regional economic bloc that both countries were members of at the time.
Overall, the war between Tanzania and Uganda was a complex mix of political, economic, and territorial disputes, fueled by historical tensions between the two neighboring countries.