What was lee’s major goal in crossing the potomac? stopping further attacks on richmond bringing the war to a closure taking out the key troops for the union building the moral of his troops

a, c, & d are correct:

they wanted lands to settle the extra population.

they wanted new markets for english goods.

they wanted to avoid civil war.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.