Which they do in short order. Lines of bright sparks race up the sides of the buildings and they crash into the ground, creating a wall with one gap where she stands at the intersection. The tanks pause, and then begin funneling towards the hole. She waits until the first one is almost on top of her before pulling an enormous warhammer out of nowhere and taking an underhanded swing at the front of the tank and sending it flying end over end through the air as if it were made of paper.

Pretty lanterny power set for someone who's not a lantern.

She considers pulling the guy out of the tank and decides that that'll lead to her fighting one or both sides of this war in the next ten seconds, which she just got through deciding not to do. She sticks to observation.

An explosive shell screams down and detonates directly on top of her. When the blast clears, she's standing in exactly the same spot, apparently entirely unaffected. She tosses the warhammer aside, and it vanishes as she rushes forward to punch a tank literally in half. She then jumps up and smacks the ground upon landing, creating a shockwave that bounces the two pieces into the air. A beam of light shoots out from each of her now upraised hands, clipping the floating scrap and sending them crashing down to explode.

Very impressive.

She wonders idly whether she could take her in a fight. Anneia's clearly more durable, but Karen can in theory keep her armor up, and it's deeply unclear which of them has more firepower.

She continues destroying tanks and essentially ignoring incoming fire. Occasionally a particularly heavy concentration will make her pause for a moment, but she's always right back into it afterward. In a little less than ten minutes, there are no more intact vehicles in the immediate area and the buildings have been ground into even finer rubble.

She takes one last look around, dusts her hands off, and trots back over to where the green girl is waiting.

"Why do they bother sending tanks against you, with that kind of power difference?"

"They were hoping I wouldn't be here. Or be younger or stupider or tireder."

"Could they not have retreated when they realized you weren't? I guess tanks make that hard."

"And also we kinda didn't want to, y'know, let them."

She sighs. Good old wars of attrition. 

"All right, well, I've brainstormed for five minutes and I have zero idea how to contact home, so I guess I'm waiting for them to contact me."

"That sounds like it kinda sucks!"

"Just a bit! But I daresay I'm not having the worst day out of everyone in a one-mile radius right now. D'you mind me asking - if the Compact doesn't care about this place, and you guys don't care about this place, and it's not really strategically relevant in any way, is there, like, a reason to be fighting over it? Surely you could find less lethal ways of practicing."

"Well if we just give things up without even trying that's a- bad habit? to be in. And there's only so much you can learn in theory if there's not even a little danger."

Sigh. "I guess if they're gonna go for it then you gotta defend it. Must lead to a lot of bombed-out planets, though."

"There's lots of planets. And you can always rebuild cities."

"I guess. What're the casualty numbers on something like this?"

"Usually in the thousands or so."

"Ah. Can't rebuild people. Unless I'm super mistaken about your tech level."

"Well. No."