989-1050 · Charroux, France
The Peace and Truce of God Movement
Medieval bishops and monks, tired of watching knights burn farms and kill peasants, launched a grassroots campaign to limit warfare — one of the first organized peace movements in Western history.
After the collapse of Carolingian authority in the late 900s, much of Western Europe descended into low-level chaos. Local lords built castles, raised private armies, and fought each other constantly. The people who suffered most were the ones who always suffer most: peasants, clergy, merchants, and anyone who could not fight back. Starting around 989, Church leaders in southern France began organizing councils that extracted oaths from knights to protect noncombatants. This was the Peace of God: you could fight other armed men, but churches, monasteries, peasants, women, and livestock were off-limits. By the 1020s, the movement expanded into the Truce of God, which banned fighting during specific times — Lent, Advent, Sundays, and eventually most of the week. Violations meant excommunication. The movement spread across France, into Germany, Italy, and Spain. It was enforced unevenly, and plenty of knights ignored it. But it represented something new: the idea that the Church had a responsibility to restrain violence, that warfare needed moral limits, and that ordinary people had a right to protection. These principles fed directly into the later development of just war theory and international law. The Peace and Truce of God did not end medieval violence. No single movement could. But it planted the idea that there are rules even in war, and that breaking them is a sin, not just a crime.
Why it matters
Established early principles of noncombatant protection and limits on warfare, contributing to the development of just war theory and the Western tradition of humanitarian law.
What Happened
Beginning with the Council of Charroux in 989, French bishops organized assemblies where knights swore oaths to protect noncombatants — clergy, peasants, women, merchants, and pilgrims. By the 1020s, the Truce of God added time restrictions, banning combat during liturgical seasons and eventually on most days of the week. Violators faced excommunication. The movement spread across Western Europe over the following decades, though enforcement remained inconsistent.
Why It Still Matters
The Peace and Truce of God was an early attempt to use moral authority to limit violence when legal and political authority had broken down. Its principles — that noncombatants deserve protection, that there are times when fighting is simply wrong, and that the strong have obligations to the weak — became foundational to Catholic just war teaching. The movement also shows the Church acting as a check on secular power, a role it has claimed repeatedly throughout history with varying degrees of success and sincerity.