Manors

Symbols are called CHARGES. Colors are called TINCTURES. Patterns and different types of stripes are called FURS.

Being farmers, fishermen, and traders

Their invasions led local people to turn to their local lords/nobles for safety and protection

Peasants were either free or unfree. Free peasants rented land to farm and owed rent to the Lord. Unfree peasants, or serfs, could not leave the land.

Uniting a large part of Europe under one religion - the Roman Catholic Church. He was brutal towards people he considered 'barbarians'.

Not really. During the Middle Ages, people were born into a social class for life. They had the same social position, and often the same job, as their parents.

The crowning of Charlemagne as the Holy Roman Emporer by the pope unified most of Europe under one leader and one religion: Christianity!

Chivalry

Travel in rough seas

The Catholic Church

Manage and defend their land. Appoint officials to make sure peasants did their jobs. Fight for their kinds. Act as judges.

The manor house was the center of the community and provided protection. It was also used for celebrations. Castles were an important military technology.

A little less than 500 years

There is arguably most social "mobility" nowadays, meaning people can move up in social class when they increase their education, develop valuable skills, etc.

Feudalism