Well the Incas made some great contributions to history. One way was that they made quipus. Even thought the Incas did not have a written language they did use quipus, which were a complex math and communication system. Quipu strings were very effective and they helped with math and communication all throughout the Inca empire. The Inca people also built roads, stone buildings, and developed different ways of farming. They also discovered many things about astronomy. I sure hope this helps! :)
The last answer: they demanded payment of bonuses promised to veterans
Answer:
Antecedentes.O Império Franco foi atacado por viquingues pela primeira vez em 799 (dez anos depois do ataque viquingue mais antigo em Portland, Dorset na Inglaterra), e eventualmente levou Carlos Magno a criar, desde 810, um sistema de defesa costeiro no norte do território.
