Grandes Unités Françaises
Grandes Unités Françaises (full title: "Guerre 1939-1945 Les Grandes Unités Françaises") is a monumental six-volume (the fifth volume is actually composed of four separate works) World War II order of battle and military unit history reference compiled by the historical service of the chief of staff of the French Army. The volumes were published in Paris by the Imprimerie Nationale. The volumes progress chronologically through the war, are divided by sections devoted to each corps or division of the French Army, and detail, day-by-day, the subordination of the units, their sub-units, location  of the command posts, and the actions of the units. The volumes are written in French, but the tabular organization of much of the information allows the volumes to be used by any researcher familiar with French Army terminology of World War II. The entire series runs to thousands of pages; Part 2 of Volume 5 alone has 1,422 pages. The volumes, their content, and their publication date are: Among order of battle researchers and enthusiasts, the volumes are often referred to as the "GUF", or sometimes, the "LGUF".