The purpose of this paper is to derive bounds on the sizes of tactical configurations of large girth which provide analogues to the well-known bounds on the sizes of graphs of large girth. Let ex_α(v,g) denote the greatest number of edges in a tactical configuration of order v, bidegree a, a^α and girth at least g. We establish the upper bound ex _α(v,g)=O(v ^{1+1 τ} ) , where τ= 1 4 (α+1)g−1 for g≡0(mod4) and τ= 1 4 (α+1)g+ 1 2 (α−3) for g≡2(mod4). We further demonstrate this bound to be sharp for the regular and affine generalized m-gons but not for the nonregular generalized m-gons. Finally, we derive lower bounds on ex_α(v,g) via explicit group theoretic constructions.