There were five major things that caused the U.S. Overseas Expansion:
1) New Manifest Destiny: the mission to reach from coast to coast 2) Commercial Expansion: the need for new interactions in international markets 3) Naval Power: this was still during the time when naval power was one of the greatest military powers a nation had. Having more of it, ensured your success in conflicts and influence 4) Darwinism/“White Man’s Burden”: Christian/Catholic missionaries’ missions to “uncivilized” nation, such as the ones in Africa 5) Closing of the Frontier: Americans wanted to have the “frontier”, or unmapped regions mapped and explored
All of these resulted in the spread of democracy, American influence and the realization that America was a big player at the table of nations.
the best thing to do would be to go to court and, with enough, evidence, try to get it removed. although, laws are hard to get rid of, so it might be a battle to change it.