Answer:
Why did so many Germanic tribes begin invading the Roman Empire? They were fleeing the Huns, who had moved into their lands and began destroying everything. When they were running away from the Huns, the Germanic people moved through the Roman provinces of Gaul, Spain and North Africa.
Explanation:
There are 27 grievances in total if I remember correctly. Some of them include: the unfair taxes on goods, the British Parliament passed laws that were deemed unfair, the colonists had no say in the Parliament, the colonists were not allowed to sell any goods to any other country other than Britain.
The Olive Branch petition, was an attempt to give colonists some rights while staying loyal to the British crown.