Self Government
1st October 1923, Southern Rhodesia became a Self Government.
On 1st October 1924 Northern Rhodesia (formerly NW & N.E. Rhodesia) attained Colonial Rule by the British Government.

The Break Up
After the break up of the Federation, each country retained its old name for a short period.

Nyasaland became independent and was renamed Malawi in July 1964. Northern Rhodesia, after Independence, became Zambia in October 1964.
Southern Rhodesia shortened its name to Rhodesia in October 1964 and, after 1980 Independence, became Zimbabwe.