United Fronts is a single-player mod that combines the campaigns of the original Call of Duty and United Offensive expansion with community created maps to form one large continuous campaign. It adds several new weapons and replaces almost all of the original weapon models. The mod requires the United Offensive expansion in order to play.
Actually, its not that big as in its not that "cornered up" and its more opened up like in battlefield series or your asshole when its taking a dump :)