its because the man who make the science
The answer is ''To exercise diplomacy or force''
Between 1812 and the American Civil war, the Untied States was gradually becoming a major regional player.
It was both growing in Territory as well as the economy.
It was also looking to develop a powerful Navy and gave officers to right to carry out diplomacy with the nations they encounter or use force if necessary.
West Germany had economic aid provided by the United States and the Marshall Plan. The currency reform (1948) replaced the Reichsmark with the Deutsche Mark.