In the 1960s, how many African countries became independent from the UK and joined the "Commonwealth of Nations"?

Question

Which country gained independence from France in 1953 and became an independent constitutional monarchy under King Norodom Sihanouk?

Answer 1

13
Nigeria, Sierra Leone, Tanganyika, Uganda, Zanzibar, Kenya, Malawi, Zambia, Gambia, Botswana, Lesotho, Mauritius and Swaziland