 Increasing opposition to his regime, paranoia over Milton Obote returning to overthrow him, and friction with Tanzanian president Julius Nyrere led Amin to launch the Uganda–Tanzania War, declaring war on Tanzania and annexing part of the Kagera Region.Amin's forces and his Libyan allies were defeated by Tanzanian troops and the Uganda National Liberation Front (UNLF), a political coalition formed by exiled anti-Amin Ugandans under the leadership of Obote, whose armed wing was known as Uganda National Liberation Army (UNLA).Amin was overthrown during the fall of Kampala and then fled the country, and UNLF was installed by Tanzania to replace him.