Prisoner-of-war camp relatively small size of armies, meant there was little need for any form of camp to hold prisoners of war. The Peace of Westphalia, a series of treaties signed between May and October 1648 that ended the Thirty Years' War and the Eighty Years' War, contained a provision that all prisoners should be released without ransom. This is generally considered to mark the point where captured enemy combatants would be reasonably treated before being released at the end of the conflict or under a parole not to take up arms. The practice of paroling enemy combatants had begun thousands of
War of the Fifth Coalition not been able to save Prussia. The Russian and French armies met in February 1807 at the savage and indecisive Battle of Eylau, which left behind between 30,000–50,000 casualties. Napoleon regrouped his forces after the battle and continued to pursue the Russians in upcoming months. The action in Poland finally culminated on 14 June 1807, when the French mauled their Russian opponents at the Battle of Friedland. The resulting Treaty of Tilsit in July ended two years of bloodshed and left France as the dominant power on the European continent. It also severely weakened Prussia and formed a Franco-Russian axis