Tell as normal, then show on the wartable how it goes. This way you can see everything going on without having to switch POVs between a half dozen ground troops that might just die anyway.
Consider starting with explaining your plan.
"Artillery sets up down at the south end before light, and we move battalions one through four to the western and northern edge of the compound." He set markers onto the map to indicate the positions.
"That seems a bit exposed for the artillery. Shouldn't a guard be stationed?"
"Normally I would, but we need everybody on assault. We've pulled a few light vehicles and scout squads for guard, just enough to buy time for a few of the heavy artillery to get airlifted out before it gets overrun."
He ignored the general. "Artillery will shell the compound for about ten minutes before battalions one and two assault. Hopefully artillery has opened up their walls for them to enter by then, and they'll soften up the base. About fifteen minutes later battalions three and four will enter and replace one and two, anybody left from those two battalions will switch from interior combat to securing their wall and gate fortifications."
"Only using artillery for ten minutes?"
"If we shell them continuously, they'll send a group to destroy them. We give then ten minutes, that's long enough for them to get annoyed and send a chunk of their troops the armory to suit up."
"Isn't that bad?"
"Normally yes, but one of our moles snuck a detonator in. As soon as battalions one and two move into the open, we'll take down their counter strike and weapons cache in one move."
"And if artillery doesn't open the wall up?"
"Then we're all dead."
Some more objections will be made, a few will not like the plan, maybe a few changes are suggested. Eventually, the all clear is given and you move your troops into place. For this next part, I'd either recommend A)skipping to after and recapping the battle, perhaps the generals walking the halls of their newly acquired base, or wondering where they went wrong as they are executed by the enemy, or B) listening into the battalion commander radios so you can hear what's going on from one character.
It will probably sound a bit like this.
"Artillery set up and ready."
"Battalions in place. All looks sleepy from here."
"Artillery, you are cleared to fire. Battalions one and two, start your timer."
"Opening fire." We heard the boom of artillery from here, a few seconds later followed by them impacting what we hoped was the western and northern wall of the compound. Everybody waited around the table as the wall clock ticked down ten minutes.
"Battalions one and two, cleared to engage."
"Battalion one engaging."
"Battalion two right behind you."
I nudged the two markers to the wall of the compound. "Are you able to enter the compound?" I couldn't hear anything but gunfire through the radio. "Battalion commanders, are you able to enter the compound?"
"-here, we're running in now." I breathed a sigh of relief. "There's a lot more fire than we thought, the armory didn't blow. We need three and four in here now."
"Battalions three and four engage immediately."
"I'll join one and two, battalion three will clear out the walls." I moved the figures to reflect the unplanned movement. More gunfire for a long while. I removed the figure for battalion one when they were absorbed into three, slowly moving them across the compound and ticking off enemy forces.
"This is battalion four commander, we've secured the walls but we're hurting pretty bad. Any troops you can spare?"
"One and two are nearly out as well, I'm doing what I can but I'm gonna need more troops before we drop into the bunker."
"I'll send what I can." I called the artillery emplacement. "Scouts, get down to the compound and support. The artillery is being airlifted out and we need more down there."
"No can do, we've got soldiers headed along the ridge to us. We'll head down after we mop up these guys, assuming we make it out."
After some more battle stuff, you'll either win or lose.
All of this shows planning and execution, both very tense, and raises the stakes as needed, keeping readers on their toes about what happens next. Perhaps an unexpected air strike takes out the soldiers on the ridge. Maybe everybody in the bunker decides to just blow up the base and collapse chunks of it to make it unusable. Or maybe there's more troops underground than you thought.
Most battles shouldn't be easy, and almost every plan will have some kind of deviation once attempted. The important thing about your plan is planning for your plan to fail, and preparing for that. If you didn't plan for a certain part to fail, then the important thing becomes adapting and reacting to the unexpected deviation from the plan.