Wagon / APC and AT Fire

[J6A]

There's actually a reason not to print -1 on Trucks (I was thinking about this the other day). If you do print a -1, it implies they are an armored vehicle, which means they would be immune to direct and bombardment fire results except X. You could then put on the charts that this doesn't apply to them, and there would be the confusion over X killing a unit and an unarmored transport (which trucks really are). Instead of putting lots of exceptions for that, it's just easier to put the one exception on the AT chart.