Specific Units with Swedish Ties....
Infanterie-Regiment Lübeck (3. Hanseatische) Nr. 162:
This regiment is highly notable as it featured a Swedish reserve lieutenant, Carl Belfrage, who commanded its 11th company and fought in major engagements like the Somme and Artois.
34th (Pomeranian) Fusiliers "Queen Victoria of Sweden":
Named directly after the Swedish-born Queen of Prussia and Sweden, this Royal Prussian Army regiment had a long, deep-rooted historical connection to the Swedish Empire.
Ober-Elsässisches Infanterie-Regiment Nr. 167:
Swedish volunteer and former Swedish lieutenant Diedrik Robert Thorsten von Essen served and fell in action with this regiment in 1918.
20th German Infantry Regiment (Graf Tauentzien von Wittenberg):
Olof Hedengren, a Swedish volunteer who later earned the Iron Cross, fought with this regiment during the 1918 Spring Offensive.