Below we see the smaller of Stoof's two line infantry units firing from behind a stone wall while his light infantry move to the flank. The lights would subsequently be fight my skirmishers to mutual destruction.
And then we have a later shot showing Stoof's bigger unit about to start slogging across the ploughed field. the grey blob in front of them is some smoke that arrived as part of a firing random event. The white smoke in both pics shows units that need to take a reload action before they can fire again.