Sending a squad of soldiers / Tanks near an enemy or directly AT the enemy
doesn't yield an attack order , instead the units simply move towards the target ,sometimes not even targeting the enemy at all , other times they seem to aim at the enemy but not fire
the enemy always fires first
sometimes in ridicules circumstances (a single enemy tank destroyed a platoon of tanks while they where at an advantage of both height and visibility , but they kept moving instead of attacking)
place a few enemy tanks not directly visible to your squad
send a Move order to a group of your tanks / soldiers / APCs very close to the enemy (then try farther and farther)
I would suggest adding a double click which should mean "double click"= "Target enemy"
however the core issue should be checked (why is the ai simply moving on its way when a target appears)
in high commander mode , I sent the same size platoon into the same area with a tank at the same place and as expected the enemy tank was destroyed as soon as they saw it