After successfully defending G at Refinery and Winning a Co-op game, I noticed a large Insurgent squad suddenly spawn in, just as the stats were about to be displayed. I was able to quickly take a screenshot, as shown here:

PC Specs:

CPU: i74790k
GPU: GTX970 4GB
RAM: 32GB DDR3 @1866mhz
HDD: Samsung 840 SSD