No! What you would have is a mob, at best.
An army is disciplined, and works together as a unit.
These thugs would mostly be at each other's throats as much as anything else.
At the first opposition to their "army", the "battle" would resemble what happened to the Midianites when Gideon and his 300 attacked their camp. (Judges 7)
Whoops, I should have read your much-cleverer post before I added mine.