Zanzibar merged with Tanganyika to form Tanzania in 1963.

It remained the capital when in 1964 Tanganyika and Zanzibar merged to form Tanzania.

April 26 - Tanganyika and Zanzibar merge to form Tanzania.

In 1964 it united with Tanganyika to form Tanzania.

In 1964 it joins with Zanzibar to form Tanzania.

The archipelago was once the separate state of Zanzibar, which united with Tanganyika to form Tanzania (derived from the two names).

Tanganyika united with Zanzibar in 1964 to form Tanzania.

In 1964 Zanzibar was united with the former colony of Tanganyika to form Tanzania.

As mentioned above, the situation in the early 1960s in Zanzibar, which had merged with Tanganyika to form Tanzania in 1964, was similar.

Zanzibar and Tanganyika federated to form Tanzania in 1964.