From January 1921 to June 30, 1924, he served with the General staff at Headquarters, Sixth Corps Area.[1] He later served at Fort Sheridan and Fort Bragg. He retired from military service on April 30, 1938.[1]
The President of the United States of America, authorized by Act of Congress, July 9, 1918, takes pleasure in presenting the Army Distinguished Service Medal to Colonel (Field Artillery) Manus MacCloskey, United States Army, for exceptionally meritorious and distinguished services to the Government of the United States, in a duty of great responsibility during World War I. While in Command of the 12th Field Artillery during all its operations with the 2d Division, until 16 August 1918, Colonel MacCloskey displayed marked ability and efficiency. He especially distinguished himself during the operations of the 2d Division at the Bois-de-Belleau and Bouresches, when he commanded in addition to his own regiment, the 37th Field Artillery, French Army. By this service he contributed in no small measure to the success of the Infantry Brigade in these operations. Later, as Commanding General, 152d field Artillery Brigade, he rendered able support to the attacking Infantry of the 77th Division.[2]
By direction of the President, under the provisions of the act of Congress approved July 9, 1918 (Bul. No. 43, W.D., 1918), Brigadier General Manus MacClosky, United States Army, is cited by the Commanding General, American Expeditionary Forces, for gallantry in action and a silver star may be placed upon the ribbon of the Victory Medals awarded him. Brigadier General MacClosky distinguished himself by gallantry in action while serving with the American Expeditionary Forces, in action at Vierzy, France, 19 July 1918, in making a personal reconnaissance under intense artillery and machine gun fire, in order to regulate the fire of his artillery.[2]
He married Sara Monro on August 14, 1901.[1] They had two children: Monro MacCloskey, who attained the rank of brigadier general in the United States Air Force, and Sara, who was known as Sally.[1]
