This means there are no historically accurate units, and no matter what time period the scenario is set in, the units behave the same. This fact is either a plus or a minus, depending on how you look at it. The game tries to focus on tactics without letting you worry about too much detail. The tactics come to bear in the sequence of phases which make up one turn. The purchasing menu is very easy to use.
Next phase is mobile artillery plotting.
Next phase is resolving of artillery fire, ie. The last three phases control movement and direct fire. The units move quite slowly, so you don't need to be a cat for this, but you can alter the delays in game to make reactions more important if you prefer it that way. The final phase is another round of direct fire for any units who have not fired and who still wish to do so. Any unit with MGs can fire in all three of the last phases.