Answer:
5,000 African Americans joined into the Revolutionary War for the Continental Army.
800-1,000 African Americans joined the British Army.
Step-by-step explanation:
No it is not surprising since at the time Washington had needed more soldiers desperately. Also African Americans at the time had hoped for freedom and more rights since they were fighting in the war but were given none.
The African Americans who had joined the British army had been promised protection and freedom if they had joined. It's not surprising since they were promised something so big for them at the time, just to end up not receiving it at the end.