The monarchy of Barbados was a system of government in which a hereditary monarch was the sovereign and head of state of Barbados from 1966 to 2021. Barbados shared the sovereign with the other Commonwealth realms, with the country's monarchy being separate and legally distinct. The monarch's operational and ceremonial duties were mostly delegated to her representative, the governor-general of Barbados.

The Barbados Regiment is the land force component of the Barbados Defence Force. Its main tasks are the defence of Barbados from external threats, internal security and assisting the local police in maintaining law and order. The regiment also provides Barbados' contribution to international peacekeeping and other missions. In its present form, the regiment was formed in 1979 along with the BDF, replacing the old Barbados Regiment. The Barbados Regiment is affiliated to the Royal Anglian Regiment.