However, these plans were not carried out. In mid-April, plans to evacuate the camp started by sending prisoners toward Tyrol. On 26 April, over 10,000 prisoners were forced to leave the Dachau concentration camp on foot, in trains, or in trucks. The largest group of some 7,000 prisoners was driven southward on a foot-march lasting several days. More than 1,000 prisoners did not survive this march. The evacuation transports cost many thousands of prisoners their lives. On 26 April 1945 prisoner Karl Riemer fled the Dachau concentration camp to get help from American troops and on 28 April Victor Maurer, a representative of the International Red Cross, negotiated an agreement to surrender the camp to U.S. troops. That night a secretly formed International Prisoners Committee took over the control of the camp. Units of 3rd Battalion, 157th Infantry Regiment, 45th Infantry Division, commanded by Lieutenant Colonel Felix L. Sparks, were ordered to secure the camp. On 29 April Sparks led part of his battalion as they entered the camp over a side wall. At about the same time, Brigadier General Henning Linden led the 222nd Infantry Regiment of the 42nd (Rainbow) Infantry Division soldiers including his aide, Lieutenant William Cowling, to accept the formal surrender of the camp from German Lieutenant Heinrich Wicker at an entrance between the camp and the compound for the SS garrison. Linden was traveling with Marguerite Higgins and other reporters; as a result, Linden's detachment generated international headlines by accepting the surrender of the camp. More than 30,000 Jews and political prisoners were freed, and since 1945 adherents of the 42nd and 45th Division versions of events have argued over which unit was the first to liberate Dachau. The first Dachau subcamp discovered by advancing Allied forces was Kaufering IV by the 12th Armored Division on 27 April 1945. Subcamps liberated by the 12th Armored Division included: Erpting, Schrobenhausen, Schwabing, Langerringen, Türkheim, Lauingen, Schwabach, Germering. During the liberation of the sub-camps surrounding Dachau, advance scouts of the U.S. Army's 522nd Field Artillery Battalion, a segregated battalion consisting of Nisei, 2nd generation Japanese-Americans, liberated the 3,000 prisoners of the "Kaufering IV Hurlach" slave labor camp. Perisco describes an Office of Strategic Services (OSS) team (code name LUXE) leading Army Intelligence to a "Camp IV" on 29 April.