Item 13753 - Co. A Fort McKinley, Great Diamond Island, 1931 Item 13753 - Co. A Fort McKinley, Great Diamond Island, 1931 Contributed by Maine Historical Society Item 13753 Zoom 4440px x 3295px - 14.8"w x 11.0"h @ 300dpi | Need a larger size? *Credit line must read: Collections of Maine Historical Society Image Info This view shows the barracks used by the Civilian Military Training Camp (CMTC) Co. 'A' at Fort McKinley on Great Diamond Island, Maine, 1931. Show Details