Belize is shown on Guatemalan maps as being a province of Guatemala. Whenever the political situation gets dicey in Guatemala whoever the leader is starts whipping-up passions (Falklands-style)to go and retake it.
The Brits have recruited some highly capable Ghurkas to patrol the border, but there is always the risk of invasion.
Same with Costa Rica. They disbanded their army in the 1940’s as the only way to keep it from staging coups against the elected government. If the Sandinista neighbors get ornery it could be a dicey situation.
So... Belize actually has someone patrolling its border... Cool concept.. I LIKE that idea!