Now that Strike #3 is airborne, let's adjust our doctrine a little bit.
You may have noticed that the tank units, you can tell that they're tank units by the tank track symbol if you're using NTDS symbols, have the number 3 next to their upper left side. This represents the number of actual tanks that the unit contains. When you fire a weapon at the unit, a 1 will appear in the lower left side to represent the number of weapons that unit has allocated to it.
When using NTDS symbols, infantry is represented by a large X depicting the crossed belts of a Napoleonic soldier and artillery is represented by a dot to represent a cannon ball.