Kelvin was just a single man in this battle that involved hundreds of millions of soldiers. He was just a small spoke on a small wheel in a very large machine.
He felt insignificant as he saw large boulders and dangerous spikes sail through the air towards him. He couldn't run or hide. He could only hope that everyone else did the job they were assigned to.
Fortunately, he wasn't disappointed so early into the fight. The surveillance, targeting, and control systems that Command was using to direct the combat bots were impeccable. It won't be an understatement to call it one of the best in the galaxy.
Every projectile hurtling towards the human army was destroyed beyond fail. Even the extraordinary arrows shot by powerful royal elves that could move through the air and change trajectory couldn't harm the human soldiers because of the small field projected above them to protect them.