The spaniards were excited about making a new colony on land that was "Claimed" for them by explorers.
Do you have options? If not I can list a few:
Illegal drugs.
Illegal Weapons.
Illegal stuff.
Unregistered people.
Terrorists.
Treaty
So a treaty requires the consent of the United States Senate to come into effect while an executive agreement does not.
Republic, form of government in which a state is ruled by representatives of the citizen body. ... Because citizens do not govern the state themselves but through representatives, republics may be distinguished from direct democracy, though modern representative democracies are by and large republics.
It was 1972 when the last foot touched the moon