The 1st Royal Bavarian Uhlans “Emperor William II, King of Prussia” (Königlich Bayerisches Ulanen-Regiment „Kaiser Wilhelm II., König von Preußen“ Nr. 1) was a light cavalry regiment of the Royal Bavarian Army. The regiment was formed in 1863 as a Uhlans unit. It fought in the Austro-Prussian War, the Franco-Prussian War and World War I. In 1919 the regiment was disbanded.
The original article can be found at 1st Royal Bavarian Uhlans "Emperor William II, King of Prussia" and the edit history here.