To ensure that no single branch became too powerful
Answer:
India, Malaysia, The Philippines, Indonesia, Singapore, Brunei, Cambodia and Laos.
Serfs/Peasants would live on the protected land of the lord's manor in exchange for food and goods. The serfs/peasants basically fueled the manor and created self sufficiency, to the point where some lords even forbade Serfs/Peasants to leave their estate.
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