User blog comment:Brianbreed/Why Do I Burn Kaiden?/@comment-4118072-20120106181735/@comment-2127131-20120106185822

I honestly don't know. A logical reason (In my mind)... Who ever was sent to with Kirrahe decide to hold back the Geth so Kirrahe and his men could fall back, with any wounded men and get them to safety.