(37th Landwehr; 5th Corps District—Posen. 349th Landwehr; 8th Corps District—Rhenish Province. 437th Regiment; 11th Corps District—Thuringe.)

1916.

The 91st Division (Clausius Division) was formed about August, 1916, from two Landwehr regiments—the 349th and the 350th, which constituted the 175th Brigade, taken from the 88th Division—and an active regiment, the 150th, temporarily transferred from the 37th Division. Later the organization of the 91st Division was modified.

Volhynia.

1. As soon as it was organized the 91st Division was engaged on the Stokhod, north of the Kovel-Sarny railway and in the vicinity of Borovno (August, 1916). During these attacks the 150th suffered very big losses. This regiment rejoined its division (the 37th) shortly thereafter and was replaced by the 37th Landwehr, which had exercised a discreet surveillance over the Austrian troops (Russian information).

1917.

Volhynia.

1. During the year 1917 the 91st Division was kept in Volhynia in the region of the Kovel-Sarny railway.

2. About the month of April it transferred the 350th Landwehr to the 45th Landwehr Division. It received the 437th Infantry, which had been organized in 1916 from Prussian elements taken from the 344th Infantry, the 349th Landwehr, and the 350th Landwehr, and which was with Austrian units.

In November the division seemed to have no particular sector and is “distributed among the little reliable troops of the Austrian Army,” (Weekly Bulletin of Information of Russian Army, Dec. 16–23, 1917.)

VALUE—1917 ESTIMATE.

Kept in Russia for the occupation of Ukrainia, the 91st Division had but a very small combat value (April, 1918).

1918.

1. The division was last identified in the Ukraine at the end of August. There is evidence that the division was brought to the Western Front in September. Reports and prisoners’ statements pointed to the presence of the division in the Muelhausen area during October. However, it did not come into line on the Western Front. The division was not identified after the armistice among the retreating German units.

VALUE—1918 ESTIMATE.

The division was rated as fourth class.