What was the significance of building the panama canal to america?

Explanation:

Control of the Panama Canal was a major strategic asset for the United States. Besides facilitating trade and maritime traffic between the West Coast and the East Coast, it also allowed to quickly mobilize the US Navy from the Atlantic to the Pacific or viceversa in case of an armed conflict in a distant part of the world.

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.