With over 2,000 new prisoners taken in Louisiana on April 8 and 9 1864, at the battles of Mansfield, and Pleasant Hill, the stockade was quadrupled in size. Among those imprisoned there following these battles were 17 members of the 47th Pennsylvania Infantry, the only regiment from the Commonwealth of Pennsylvania to fight in the Union's 1864 Red River Campaign across Louisiana and the only regiment from the Keystone State to have men imprisoned at Camp Ford. With more prisoners captured in Arkansas, the prison's population peaked at about 5,000 in July 1864. The population was reduced by exchanges in July and October 1864, and again in February 1865. The last 1,761 prisoners were exchanged on May 22, 1865.