British military history

British military history is a long and varied topic, extending from the prehistoric and ancient historic period, through the Roman invasions of Julius Cæsar and Claudius and subsequent Roman occupation; warfare in the Mediaeval period, including the invasions of the Saxons and the Vikings in the Early Middle Ages, the Norman Conquest, and wars against France; through the Early Modern period, wars against Spain and France, and the English Civil War, and the beginnings of the colonial British Empire in India, the USA and Canada; and into the Modern period with the wars of Marlborough and against Napoleon, the Crimean War and into the 20th century with the Boer War, World War I and World War II, the Cold War the Korean War; and, most recently, Northern Ireland, the Falklands War and military operations in the Balkans and the Middle East.

List of British military alliances

Scottish military alliances

• Auld Alliance (1165-1560)

English military alliances

• Anglo-Portuguese alliance (1386-)
• Holy League (1510 to 1513)
• Triple Alliance (1668)
• Grand Alliance (1689 - ?)

British military alliances

• Anglo-Portuguese alliance (1704-)
• Triple Alliance (1717)
• Triple Alliance (1788)
• Entente Cordiale (1904)
• Triple Entente (1908)
• NATO (1949-)
• Western European Union (1954-)
• Five Power Defence Arrangement (1971-)