Complex sentence: The army ordered sutler stores at prison camps shut down on December 1,1863 in retaliation for reported Confederate mistreatment of Union prisoners, and the store at Camp Douglas was closed on December 12.
Split into simpler sentences: The Army ordered sutler stores at prison camps shut down on December 1,1863 in retaliation for reported Confederate mistreatment of Union prisoners. The store at Camp Douglas was closed on December 12.