Commanding generals  BG Edwin B. Babbitt: July 3, 1921 – October 10, 1921 MG Samuel D. Sturgis Jr.: October 10, 1921 – April 17, 1923 MG Edwin B. Babbitt: April 17, 1923 – September 15, 1923 MG William Lassiter: October 1923 – September 19, 1924 BG Fox Conner: September 19, 1924 – January 1925 MG Charles H. Martin: January 23, 1925 – October 10, 1926 MG William S. Graves: December 13, 1926 – October 1, 1927 MG Malin Craig: October 13, 1927 – March 31, 1928 MG George LeRoy Irwin: April 1, 1928 – December 21, 1930 BG Charles DuVal Roberts: December 21, 1930 – April 3, 1931 BG Harold B. Fiske: April 3, 1931 – April 15, 1932  
Panama Mobile Force were activated on February 16, 1940 by Panama Canal Department commander, lieutenant general Daniel Van Voorhis in order to improve defense of the Panama Canal Zone. Four infantry and one engineer regiments; and two artillery battalions were assigned to the Mobile Force, even after World War II began. The plan to defend the Canal Zone was to conduct a mobile defense in depth beginning at the beaches and not by preparing and holding static defense positions. The Atlantic side was considered the least likely invasion route because the few landing areas there were too small to allow the discharge of numerous forces simultaneously. Commanding generals Panama Canal Division BG Edwin B. Babbitt: July 3, 1921 – October 10, 1921 MG Samuel D. Sturgis Jr.: October 10, 1921 – April 17, 1923 MG Edwin B. Babbitt: April 17, 1923 – September 15, 1923 MG William Lassiter: October 1923 – September 19, 1924 BG Fox Conner: September 19, 1924 – January 1925 MG Charles H. Martin: January 23, 1925 – October 10, 1926 MG William S. Graves: December 13, 1926 – October 1, 1927 MG Malin Craig: October 13, 1927 – March 31, 1928 MG George LeRoy Irwin: April 1, 1928 – December 21, 1930 BG Charles DuVal Roberts: December 21, 1930 – April 3, 1931 BG Harold B. Fiske: April 3, 1931 – April 15, 1932 Panama Mobile Force MG Ben Lear: February 16, 1940 – September 20, 1940 MG William E. Prosser: September 21, 1940 – March 1942 MG Robert H. Lewis: March 1942 – December 21, 1942 MG Harry C. Ingles: December 22, 1942 - February 1943 BG Jesse C. Drain: February 1943 - April 2, 1943 MG Phillip E. Gallagher: September 3, 1944 – April 1, 1945 BG Thomas J. Camp
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Commanding generals
Panama Mobile Force were activated on February 16, 1940 by Panama Canal Department commander, lieutenant general Daniel Van Voorhis in order to improve defense of the Panama Canal Zone. Four infantry and one engineer regiments; and two artillery battalions were assigned to the Mobile Force, even after World War II began. The plan to defend the Canal Zone was to conduct a mobile defense in depth beginning at the beaches and not by preparing and holding static defense positions. The Atlantic side was considered the least likely invasion route because the few landing areas there were too small to allow the discharge of numerous forces simultaneously.
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Commanding generals Panama Canal Division
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Panama Mobile Force
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MG Ben Lear: February 16, 1940 – September 20, 1940 MG William E. Prosser: September 21, 1940 – March 1942 MG Robert H. Lewis: March 1942 – December 21, 1942 MG Harry C. Ingles: December 22, 1942 - February 1943 BG Jesse C. Drain: February 1943 - April 2, 1943 MG Phillip E. Gallagher: September 3, 1944 – April 1, 1945 BG Thomas J. Camp