Hesse-Hanau Regiment Erbprinz was a line infantry regiment raised by Hesse-Hanau and put to the disposition of the British Crown, as part of the German Allied contingent during the American Revolutionary War. It was organized with a grenadier and five regimental companies, commanded by Colonel Wilhelm Rudolf von Gall. The regiment participated in the siege of Ticonderoga 1777, the battle of Freeman's Farm 1777 and the battle of Bemis Heights 1777. It surrendered at Saratoga with the rest of the troops under Burgoyne. After the end of the American Revolutionary War, the two battalions were merged into one regiment which in 1785 received the name "Hesse-Hanau Grenadier Regiment"; a name that was changed to Leib-Grenadier-Regiment the following year.