What where the characteristics of the roman republic and how did they change over time?

In the beginning of the Roman Republic, all male descendants of the original tribes of Rome and over the age of 15 became citizens. Citizens of Rome worn togas to set them apart from slaves and noncitizens. There were several classes of citizenship. Full citizens, the patricians could vote, marry freebie persons, and practice commerce, own a business, and participate in the senate. The second class of citizen was the plebeians, were like the middle class. They could vote, marry freeborn persons and own a business. But could not participate in the senate. Then the slave class. which had very few rights. over time the plebeians gained power and were able to become consul. And the gap between the classes began to shrink until the Roman republic became the Roman Empire

In 911, a group of vikings lead by rollo besieged paris and chartres. after a victory near chartres on 26 august, charles decided to negotiate with rollo. the talks were led by hervé, the archbishop of reims. this resulted in the treaty of saint-clair-sur-epte, which granted rollo and his soldiers all the land between the river epte and the sea. it also granted him brittany, "for his livelihood". at the time, brittany was an independent land which france had not been able to conquer. in exchange, rollo promised the king his loyalty and military assistance when needed. also rollo also agreed to be baptised and to marry gisela, the king's daughter. the territory given rollo is about the same as upper normandy. this would grow to become normandy under rollo's descendants. - wikepedia