Answer:
1. They presented a united front.
2. They could form their actions better.
3. The British could not divide them.
Step-by-step explanation:
Because Americans united, they could present their demends as a single unit to the British for starters. Secondly, they could all unite behind the decisions made, because they represent the all of the Americans.
Americans, when they united, could then be more secure and work better together to form their plan of action. There would be less dissent in their own ranks and that would lead to faster decision making.
Finally there is strength in unity, and that certainly was true during the Revolutionary War. Because they were united the British could not divide them, thus making their military and their resolve weaker.