The country that became independent in 1963 after British wars to retain colonies is Kenya.
1. Kenya gained independence from British colonial rule on December 12, 1963.
2. The Mau Mau Uprising in Kenya played a significant role in the fight for independence, where Kenyan rebels, known as the Mau Mau, resisted British colonial rule through guerrilla warfare.
3. Jomo Kenyatta, a prominent leader in Kenya's independence movement, became the country's first Prime Minister and later its first President after independence.
Therefore, the correct answer to the question is Kenya.