 Subordinate regiments conducted training for the Citizens Military Training Camp (CMTC) at the Presidio of San Francisco, the Presidio of Monterey and at Del Monte; often with assistance from the 30th Infantry Regiment.The 91st Reconnaissance Troop participated in the Rome-Arno (22 Jan 44 – 9 Sep 44), North Apennines (10 Sep 44 – 4 April 45), and Po Valley (5 Apr 45 – 8 May 45) campaigns.In July 1944, during the Arno Campaign of the Second World War, the 91st Reconnaissance Troop spearheaded Task Force Williamson under the command of Brigadier General E.S.