What were both nobles and knights obligated to do? remain loyal to one another protect those who lived on the manor take an oath of chivalry provide personal and military service to the king

Nobles and knights were obliged to protect those who lived on the manor and provide personal and military service to the king.

Provide personal and military service to the king

In feudalism land donations and titles were presented in as a present for support and army service. Several nobles were considered to serve as knights, whereas more nobles were considered to preserve military authorities. Under the nobles, knights were placed and below them were the peasants.Kings preferred loyalty to the nobles and aristocrats were designated for the responsibility of the king's assurance, and farmers used to assist with the food.

are these the benchmarks questions?

the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.