longstreet's attack was delayed, however, because he first had to wait for his final brigade (evander m. law's, hood's division) to arrive, and then he was forced to march on a long, circuitous route that could not be seen by union army signal corps observers on little round top. it was 4 p.m. by the time his two divisions reached their jumping off points, and then he and his generals were astonished to find the iii corps planted directly in front of them on the emmitsburg road. hood argued with longstreet that this new situation demanded a change in tactics; he wanted to swing around, below and behind, round top and hit the union army in the rear. longstreet, however, refused to consider such a modification to lee's order.