In normal circumstances, a Mecha is like a tank loaded with countless heavy weapon modules. Just bomb it, and it's done.
"Boom, boom, boom!"
Missile batteries fell in swathes, the flamethrowers mercilessly scorched the earth.
"Da-da-da-da-da!"
The rotary heavy machine guns spewed fervent tongues of fire, turning everything within sight into smithereens.
Without interference from a similarly-leveled opponent, a war machine that doesn't need to watch for attacks and simply needs to unleash unbridled firepower becomes an invincible force on such a battlefield.
And it's not just one of them!
Without the restraint of high-end combat power, even the elite members of the Bug Race like the artillery bugs, mantis bugs, and sand bugs couldn't prevent the overall collapse.