The Trinidad and Tobago Defence Force (TTDF) is the military organisation responsible for the defence of the twin island Republic of Trinidad and Tobago. It consists of the Trinidad and Tobago Regiment, the Trinidad and Tobago Coast Guard, the Trinidad and Tobago Air Guard and the Defence Force Reserves.

Trinidad and Tobago, officially the Republic of Trinidad and Tobago, is the southernmost island country in the Caribbean. Consisting of the main islands Trinidad and Tobago and numerous much smaller islands, it is situated 11 kilometres off the coast of northeastern Venezuela and 130 kilometres south of Grenada. It shares maritime boundaries with Barbados to the east, Grenada to the northwest and Venezuela to the south and west. Trinidad and Tobago is generally considered to be part of the West Indies. The island country's capital is Port of Spain, while its largest and most populous municipality is Chaguanas.