OSS/London: Special Operations Branch and Secret Intelligence Branch War Diaries is a themed microfilm collection relating to US Office of Strategic Services (OSS)intelligence analyses and special operations in Western Europe, Jun 1942-Jun 1945. The collection includes Special Operations Branch organisation charts and directives, orders and summaries, Jun 1942-Jul 1944; Special Operations (SO) Branch and OSS training schedules; papers relating to Special Operations Branch liaison with Scandinavian Special Operations Executive (SOE) Section; reports on military and strategic objectives relating to Operation OVERLORD, the Allied invasion of France, Jan-Sep 1944; estimates of Special Operations personnel strength, Apr-Jun 1944; reports on resistance movements in Norway, Denmark, and Poland; summaries of Secret Intelligence Branch Operations, Apr-Sep 1944; list of decorations, commendations, and payments to families of the Special Operations and Secret Intelligence Branch casualties; biographies of Secret Intelligence personnel; reports from Secret Intelligence Branch operations in the Netherlands, France, Poland, Czechoslovakia; Germany; Secret Intelligence Branch liaison with the OSS; photographs of American and British Special Operations Branch officers; photographs of Maquis, French resistance, operatives; report from the Special Mission on German Methods of Demolition and Sabotage, Sep-Dec 1944; reports on Polish resistance fighters in France, 1944; lists of code names and code words used by the Special Operations Branch; reports from military, demolition, intelligence gathering, and espionage missions in Western Europe, 1944; after action summaries from the OSS Reports and Registry Division, London, and the OSS Reports Board, Paris, France, 1 Jan-15 Jun 1945.

Collection includes five postcards, four of which are of British troops from 1 Airborne Div at Hotel De Tafelberg, Oosterbeek, Netherlands, during Operation MARKET GARDEN, the Allied attempt to establish a bridgehead across the Rhine river at Arnhem, 17 Sep-25 Sep 1944, and one of the Airborne Monument at Oosterbeek, built by J Maris, 1946; and a personal account by Henk B van der Horst entitled, Paratroopers Jump, Fury over Arnhem (Boekhandel Romijn, Oosterbeek, 1946), relating to the Allied airborne offensive at Arnhem, 17 Sep-25 Sep 1944.