It is flat ground.
A little research tells us that medieval European villages were probably not smelly. The people believed cleanliness was next to godliness, and most people bathed regularly. Most towns and many villages had public baths. The medical belief at the time was that disease was spread by bad air, which translated into air that smelled bad in most people's minds, and we have records of butchers being fined because they did not clean up waste quickly enough. The records we have of manure piles, floors strewn with foul straw, and open sewers running through towns were mostly written during the Renaissance, and were probably intended to show the Renaissance was superior.
next to the erect tree
Every country has houses next to rivers.
Rivers are important in early settlement of land. Before advanced technology, it was important to be next to a water source for hydration, food, and travel. Many early cities, companies, and communties in history have been started around rivers.
Nistru and Tisa.
yes
king William
On the side where the river flows slowest.
For strength in their next battle, and courage to carry on.
Actually, they did bathe in the Middle Ages. The people believed that cleanliness was next to godliness and kept very clean. They also believed that bad air, with foul odors, carried diseases. They had public baths in many villages. Later, the Renaissance came. People discovered perfume and went into a period when the only parts of the body to get cleaned were the parts other people could see. They knew medieval people did not have perfume, and liked very much to describe the Middle Ages as inferior to their own, so they called the medieval people dirty and stinky. They convinced alter historians of their own superiority, and people still believe them.
Settling next to rivers gave them water for crops, drinking, etc.