Original: The following year, at the Convention of Kanagawa (March 31, 1854), Perry returned with seven ships and forced the Shogun to sign the "Treaty of Peace and Amity", establishing formal diplomatic relations between Japan and the United States.
Simplified: The following year 1854), Perry returned with seven ships and forced the Shogun to sign the "Treaty of Peace and Amity", establishing formal diplomatic relations between Japan and the United States.