The national flag of Tanzania (bendera ya Tanzania) consists of a gold-edged black bend, divided diagonally from the lower hoist-side corner, with a green upper triangle and light blue lower triangle. Adopted in 1964 to replace the individual flags of Tanganyika and Zanzibar, it has been the flag of the United Republic of Tanzania since the two states merged that year. The last sultan was overthrown in the Zanzibar Revolution on 12 January 1964, and the Afro-Shirazi Party – the ruling political party of the newly formed People's Republic of Zanzibar – adopted a national flag the next month that was inspired by its own party flag. The thin stripes stand for Tanzania's mineral wealth, derived from the "rich deposits" in the land.