EAC: History

1917 Customs union between Kenya and Uganda is formed.
Tanzania joins the Customs Union. 1927
1948 EAC is named the East African High Commission.
The name changes to East African Common Services Organization. 1961
1967 The East African Common Services Organization is superseded by the East African Community.
The East African Community collapses due disagreements between member countries. 1977
1999 The East African Community is reestablished when its treaty was signed.
New treaty comes into force. 2000
2009 Burundi and Rwanda join the EAC.
South Sudan becomes the sixth member of the East African Community. 2016

Sources

East African Community: History of the EAC

Glossary