If you refer to 1910 british victory against afrikaners (permanent settlers in South Africa of dutch origins), than it's south Africa.
No, India gained its independence in 1947 and is now a sovereign nation.
In 1858, The British government was handed India after a series of revolts. The addition of India to the British empire brought large amounts of wealth to the nation. During other takeovers, Britain gained control over China as well.
The British Empire colonized the nation we now call Guyana. It was called British Guiana until the nation gained its independence in 1966.
The United States owned and took control of Louisiana by 1803.
Mauritius is an independent island nation; a sovereign state. The people of Mauritius are Mauritians. At one time Mauritius was under the control of the British, but it gained independence in 1968.
No, Afghanistan is not a British colony. It was never fully colonized by Britain, although it was subject to British influence during the 19th and early 20th centuries, particularly during the Anglo-Afghan Wars. Afghanistan gained independence from British control in 1919, following the Third Anglo-Afghan War. Today, Afghanistan is a sovereign nation.
Canada
France was defeated.
Australia is the largest former British colony south of the equator. It gained independence from Britain in 1901 and is now a sovereign nation.
The United States of America was in control of the Philippines, in 1900. The United States won control of the Philippines from the Spanish in 1898.
By the 20th century, Britain had gained control of South Africa following a series of conflicts and territorial gains, notably the Anglo-Zulu War and the Anglo-Boer Wars. The British established the Union of South Africa in 1910, uniting the Cape Colony, Natal, Transvaal, and the Orange Free State under a single government. This consolidation marked the beginning of a period of British dominion that would last until the mid-20th century.
Portugal gained control of Brazil through the Treaty of Tordesillas. The Portuguese, along with help from native Brazilians, were able to keep out French and Dutch invaders.