when rwanda and burundi joined eac?
The customs union between Kenya and Uganda in 1917, which Tanganyika joined in 1927, was followed by the East African High Commission (EAHC) from 1948 to 1961, the East African Common Services Organization (EACSO) from 1961 to 1967, and the 1967 to 1977 EAC. Burundi and Rwanda joined the EAC on 6 July 2009.