Complex sentence: The first contact between the US and Korea was not in any way hostile, and in 1853 the gunboat visited Busan for 10 days while en route to Japan; her officers dined with local officials.
Split into simpler sentences: The first contact between the US and Korea was not hostile in any way. In 1853 the gunboat visited Busan for 10 days while en route to Japan; her officers dined with local officials.