Prior to the actual battle, the Union soldiers practiced firing the cannons. The officer in charge who shouted the order to fire is to the left. In front of him are two teen aged boys with large leather haversacks who seemed to be in charge of the ammunition found in the metal boxes. In this drill no actual rounds were fired but the unit went through all the motions of loading and setting the charge. They even covered their ears. The point of all the drilling seemed to be to reduce the length of time it took to fire off each round. To me they seemed like a well oiled machine, but the officer was not so easily pleased.
