The Landgraviate of Hesse-Kassel was under Frederick II, a Roman Catholic and an uncle of King George III. He initially provided over 12,000 soldiers to fight in the Americas. Like their British allies, the Hessians had some difficulty acclimatizing to North America; the first troops to arrive suffered from widespread illness, which forced a delay in the attack on Long Island. From 1776 on, Hessian soldiers were incorporated into the British Army serving in North America, and they fought in most of the major battles, including those of New York and New Jersey campaign, the Battle of Germantown, the Siege of Charleston, and the final Siege of Yorktown, where about 1,300 Germans were taken prisoner, although various reports indicate that the Germans were in better spirits than their British counterparts.