In 1871, Korea was known as the "Hermit Kingdom", a country determined to remain isolated from other nations, specifically from commerce and trade from Western nations, including the United States. In 1866, U.S. relations with Korea were troubled when Christian missionaries were beheaded by the Korean "tacwongun", regent to King Kojong, and the crew of the "General Sherman", a U.S. trading ship, were massacred. Secretary William H. Seward, under President Andrew Johnson, demanded redress for what was perceived as the outrageous actions of the Korean government. U.S. Naval warships were ordered to the Orient, however, when Seward's term ended in 1869, he was unable to organize a naval expedition. When Fish took office he organized the Korean naval expedition and broadened the purposes. In April 1871, Fish ordered Frederick F. Low, minister to China, to take the Asiatic Fleet and voyage to Seoul. The purpose of the expedition was to seek retribution for the assaulted sailors and to open up a commercial treaty with the King of Korea. Fish had told the fleet not to use force unless the honor of the U.S. Flag was infringed by the Koreans.