Answer:
The detail that is most relevant to the central idea of this passage is " One Washington battle strategy was to have his troops fall back slowly and then strike the British unexpectedly. "
Step-by-step explanation:
The text shows that George Washington wants to defeat the British and break out of his tyrannical judgment with all Americans. For that to happen, Washington proves to be a great leader and begins to establish a strategy for US troops first to back down and then, quite unexpectedly, US troops to advance towards the British to attack them unexpectedly, and thus , ensure victory for the Americans.