The Colonial Office was a government department of the Kingdom of Great Britain and later of the United Kingdom, first created in 1768 from the Southern Department to deal with colonial affairs in North America, until merged into the new Home Office in 1782. In 1801, colonial affairs were transferred to the War Office in the lead up to the Napoleonic Wars, which became the War and Colonial Office to oversee and protect the colonies of the British Empire. The Colonial Office was re-created as a separate department 1854, under the colonial secretary. It was finally merged into the Commonwealth Office in 1966.

The Thirteen Colonies were a group of British colonies on the Atlantic coast of North America during the 17th and 18th centuries. Grievances against the imperial government led the 13 colonies to begin uniting in 1774, and expelling British officials by 1775. Assembled at the Second Continental Congress in Philadelphia, they appointed George Washington as commander-in-chief of the Continental Army to fight the American Revolutionary War. In 1776, Congress adopted the Declaration of Independence as the United States of America. Defeating British armies with French help, the Thirteen Colonies gained sovereignty with the Treaty of Paris in 1783.