While the defence of Bermuda remains the responsibility of the government of the United Kingdom, rather than of the local Bermudian Government, the island still maintains a militia for the purpose of defence.

Bermuda is the oldest British Overseas Territory, and the oldest self-governing British Overseas Territory, and has a great degree of internal autonomy through authority and roles of governance delegated to it by the national Government. Its parliament held its first session in 1620, making it the third-oldest continuous parliament in the world. As part of the British realm, King Charles III is head of state and is represented in Bermuda by a Governor, whom he appoints on the advice of the British Government. The Governor has special responsibilities in four areas: external affairs, defence, internal security, and policing.