Reserve-Infanterie-Regiment Nr. 213 was a reserve infantry regiment in the German Imperial Army organized shortly after mobilization in August 1914. It was assigned to the 91. Reserve-Infanterie-Brigade of the 46. Reserve-Division until September 1916, when it was transferred to the 89. Reserve-Infanterie-Brigade of the 207. Infanterie-Division.
References
Infanterie-Regiment Nr. 213 Wikipedia(Text) CC BY-SA