A study of satellite imagery, finding vacant houses by the absence of lights noted that ethnic cleansing was essentially complete by the time that the surge began, and is in fact a major reason for the reduction of ethnic violence. (see here and here)

“Our findings suggest that the surge has had no observable effect, except insofar as it has helped to provide a seal of approval for a process of ethno-sectarian neighborhood homogenization that is now largely achieved,” Agnew’s team wrote in their report.

(emphasis mine)

Heck of a surge, Davie.