Buganda is one of the numerous Kingdoms that sprung up after the collapse of the Chwezi dynasty.
A number of theories have been put forward to explain the origins of Buganda.
According to oral traditions in Buganda, Kintu was the first Muganda believed to have come from the direction of Mt. Elgon (Kintu came from the East).
He is said to have come with 13 or 14 of the present day clans in Buganda.
According to traditions in Bunyoro, the founder of Buganda was Prince Kato Kimera who was a twin brother to Prince Isingoma Rukidi Mpuga the founder of the Bito dynasty in Bunyoro.
He is said to have come with 5 or 6 of the present day clans in Buganda.
Other traditions claim that Buganda originated from the Bantu clans that migrated from Congo basin.
Buganda sprung up after the collapse of the Chwezi Empire with only three countries i.e. Kyadondo, Mawokota and Busiro.
In the 17th century, Kabaka Kateregga began her systematic expansion by annexing Gomba, Singo, Butambala and Kyaggwe.
Around the 18th century (1750) many immigrants arrived from Bunyoro, Mt.Elgon area and Ssese Islands to increase her population.
Between 1780 – 1789 (18th century), Kabaka Jjunju waged war against Bunyoro and managed to annex Buddu and Kooki which were rich in Iron.
Between 1814 and 1881 Kabaka Ssekamanya annexed Buwekula and Bwera and added them to Buganda.
Between 1831 – 1851, Kabaka Ssuna finally attacked Bunyoro and crashed it.
Still in the same period, Kabaka Mawanda tried to annex Busoga but failed in his attempt not until Kabaka Kyabaggu’s reign that Busoga was finally crashed.
In the late 19th century Buruuli, Mawogola, Bulemezi and Bugerere were annexed to Buganda as Bunyoro was declining.
In the 1900 Buganda agreement, Buganda was given the two lost counties of Buyaga and Bugangaizi.
This stretched her territory from Lake Albert in the west to River Nile in the East up to Northern Tanzania in the South.