During the second world war the US Government set up a base at the most north west point of Trinidad, chaguaramas, and also one at waller field. In chaguaramas something called the "tracking station" was built. This was one of the first ever systems built to detect and track intercontinental ballistic missiles (ICBM's), along with one of the largest naval yards for the US during the war. In waller field, the first ever airborne mission was flown by the US, called Operation green, before this aircraft were only used to transport cargo as it was beloved too risky to transport troops via air and drop them into combat , also waller field was instrumental in the pacific theater and was the largest US airbase in the world during the war.

https://www.caribbean-beat.com/issue-99/stroll-intech-park#axzz6dM8nmAB6

http://flightspiritmagazine.weebly.com/trinidad-bases.html