Cuba is omitted because the US holds an open ended lease for complete jurisdiction and control of Guantanamo Bay and Cuban authorities have absolutely no jurisdiction on the premises. It is for all intents and purposes, American soil. Furthermore, the US and Cuba have no diplomatic relations. So, if anything it is actually more of an occupation than a legit overseas military installation.
But I see your point. I would probably put it on the map. I didnt make the map you see. I just put it up because it was related to the other topic and I found it interesting.
Clearly you did too. 😉