HISTORY.
(18th Corps District—Hesse—Nassau, Hesse—Hombourg, Frankfort.)
1914.
The 21st Division belonged organically with the 25th Division of the 18th Army Corps District (Frankfort on the Main).
Ardennes.
1. In August, 1914, it formed a part of the 4th Army (Duke of Wurttemberg). Entering Luxemburg on August 10, Belgium August 12, it fought on the 20th at Neuf Chateau, on the 22d at Bertrix and Orgeo, on the 24th at Matton, and crossed the Meuse on the 28th.
Marne.
2. In September it took part in the battle of the Marne between Vitry and Sermaize (Etrepy, Pargny sur Saulx). From there it retired in the direction of Rheims, being in action northwest of the city from September 15 to 20.
3. In October it was reassigned with the 18th Army Corps to the 2d Army, which at this time formed the right flank of the German Army (vicinity of Roye).