Plymouth was in Massachusetts. The shore was rocky and was snowy making growing crops difficult. It was also cold so a lot of people died.
Yarg, I caught a whale!
The came to escape religious persicution in England. They we're very strict and they all believed that if they kept faith in god that he would help to make the colony successful.
The separatist under William Bradford decided on the Mayflower Compact. The compact was so all men worked together to get the job done. Every man that came signed it and women were not allowed to participate.
The soil in Plymouth was not suitable for growing crops, but they did land in Cape Cod, so fishing and whaling became the colonies was of making money. This was mainly because whale blubber was very expensive.