The president was assassinated.
In the War of 1812, caused by British restrictions on U.S. trade and America's desire to expand its territory, the United States took on the greatest naval power in the world, Great Britain.
Answer:
The Balkans is an area in Southeast Europe containing countries like Serbia and Austria (around WW1). It was seen as the Powder Keg of Europe due to many conflicts between the people and countries in the area.