Eleven months after the signing of the Jay Treaty, the United States and Spain agreed to the Treaty of San Lorenzo, also known as Pinckney's Treaty. Signed on October 27, 1795, the treaty established intentions of peace and friendship between the U.S. and Spain; established the southern boundary of the U.S. with the Spanish colonies of East Florida and West Florida, with Spain relinquishing its claim on the portion of West Florida north of the 31st parallel; and established the western U.S. border as being along the Mississippi River from the northern U.S. to the 31st parallel.