Why did the vassals and lesser lords have to provide a greater lord and the king in the feudal system?​

Explanation:

Fedual Society:

Feudalism was a loosely organized system of rule in which powerful local lords divided their landholdings among lesser lords. In exchange, lesser lords, or vassals, pledged service and loyalty to the greater lord.

-   Everyone had a place in feudal society.

-   Below the monarch were the most powerful lords who held the largest fiefs. Each one of these lords had

   vassals in turn had their own vassals.  

-   In many cases, the same man was both vassal and lord - vassal to a more powerful lord above him and lord  

   to a less powerful vassal below him.

a historian who compares the expansion of political systems to the expansion of economic systems to the expansion of economic systems is organizing history by theme.

hope this : d

the french gave their support to another tribe during he war.