The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The traditions of "peace and truce of God" tied in with the call of the Crusade in that the western European countries tried to keep their properties from the Muslim troop's invasions. They tried to protect private property from being destroyed.
The concept of "peace and truce of God" was created by Catholic bishop Le Puy in 975. The term was coined to protect civilians from the attacks of the enemy troops. The idea was to keep sage women, children, peasants, and the clergy. During the council of Touilouges in 1027 was declared officially in Europe.