Who got hit in Turn 1

A few regiments took heavy losses in Turn 1. Here are the top 11. There are 7 Union and 4 Confederate regiments. 8 of the regiments were engaged at Cosner's Gap, with 3 at Sagarville.

The regiment with the heaviest losses was the 1st Pennsylvania Cavalry, which was on the skirmish line that was faced with the initial Confederate onslaught at Cosner's Gap. The regiment's brigade commander fell in the action. 

The 87th Indiana was one of the first infantry regiments to arrive on the field at Sagarville and took heavy losses from sharpshooters while waiting for the rest of its division to come up before it could even advance to engage the enemy.