As lee prepared to invade the north a second time, what are three things he realized?

Morale in the north was at an all-time low. davis was getting impatient with his losses. a big win on union would end the war

I believe the answer is:A. exclusion from office of aristocratic Southerners who had been part of secession

Johnson believed that by allowing the southerners who had been part of secession into the government, united states would risk another civil war in the future because those people would start planting their influence from within government's main body.