JOHANNA - Treaties
| Signed on | In force on | Title |
|---|---|---|
| 8 November 1844 | 8 November 1844 | Treaty Between Her Majesty The Queen Of England And The Sultan Of Johanna, for the Suppression Of The Slave Trade. |
| 3 June 1850 | Treaty of Peace, Friendship, and Commerce, between Great Britain and Johanna | |
| 8 March 1873 | Engagement of the Sultan of Johanna, as to Protection to be afforded to Immigrants in the Island of Johanna | |
| 10 October 1882 | 28 February 1883 | Convention between Great Britain and Johanna, for the Suppression of Slavery and the Slave Trade |