Prior to World War I, what countries were part of the British Empire?

The British Empire held Canada, Australia, New Zealand, Tonga, Fiji, Western Samoa, India, Burma, Papa New Guinea, Malaya, Sarawak, Brunei, Oman, Iraq, Egypt, Libya, Sudan, Kenya, Uganda, Northern and Southern Rhodesia, Tanganyika, Zanzibar, Mauritius, the Maldives, South Africa, Swaziland, Nigeria, Gold Coast, and Sierra Leone, among other countries during its reign.

Explanation:

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