The invasion of Panama to depose Manuel Noriega was the root of Gunboat Diplomacy. Before the Panama Canal was constructed, the country of Panama was a province of Columbia. The Federal Government of the United States used the Monroe Doctrine to construct an imperial diplomacy, which initially staked out a sphere-of-influence that warned Old World powers not to attempt any further colonial adventures in the New World: the New World was to be dominated by the United States. The drive to build the canal as a short-cut between the Atlantic and Pacific Oceans came about largely from the interests of the United States Navy, which recognized that the strategic control of the continent would devolve on anyone who had control of a canal at the narrowest point in the land: and there was the geo-political aspect of control of the Pacific Ocean. The British Navy had already proven the necessity of controlling the ocean as a supply line for colonial expansion.
The biggest obstacle to building the Panama Canal was the issue of who would control it. The next biggest obstacle was the fact that the area was covered with jungle, which was a breeding ground for diseases Western medicine had never encountered. When President Roosevelt got behind the Navy to push its interests, influenced by the British Naval