It's been a while since I read Caesar (like a few months), but the conspirators made sure to arrange a meeting with Caesar so they could assassinate him against his knowledge (sorta, I think he suspected they would kill him)
B. French settlers were on friendly terms with Native Americans and they relied on them to provide furs.
The French settled the Great Lakes region and used the land to acquire fur. Due to the nature of fur trapping, the French relied on Native American tribes to help them through the landscape. The French settlers were made up of male fur traders and missionaries. Due to the economic relationship between the two groups, the French often married Indian women and they would live among the tribes.
The anaconda plan made sure that it blocked any supply routes that the confederates would use as a advantage