possible "SPOILERS" don't read past this unless you've read the comics or if you wanna know then read on
in the comics the gov didn't want new people in his community, he just wants what they have, hence why he went after that National Guard unit, we just wanted the supplies they had, and any surviving people were put into an arena vs. walkers for the Woodbury people's entertainment, if the people fighting beat the walkers they fight again, some survivors are fed to his daughter(who was supposed to be locked in that room with those heads at the end of the show), but in the comics it was Rick, Glen, Michonne and someone else(T-Dog I think) who were captured, none of them wood speak so they were tortured, they cut Ricks right hand off, Michonne was raped & beaten non-stop for days by the Gov. all because they were wearing the prison riot gear telling the Gov they have valuable items and a much better secure place that he wants.