A more thorough explanation:

Definition: Feudal action is a type of legal action that deals with real property. It was used in medieval times when land ownership was based on the feudal system.

Example: If a lord wanted to reclaim land that he had granted to a vassal, he would use feudal action to do so. This type of legal action was only concerned with real property, such as land or buildings, and not with personal property like money or goods.

Explanation: Feudal action was an important legal tool in medieval times because it allowed lords to maintain control over their land. The example shows how a lord could use feudal action to reclaim land that he had granted to a vassal. This was important because the feudal system was based on the idea of land ownership and control. By using feudal action, lords could ensure that their land remained in their possession and under their control.