Because of the best operational strategy the Mongols chose a terrain more favorable to their type of maneuver. In this case, the best hypothesis that we consider for the Europeans to try to reverse this disadvantage would be to reinforce their deployment in the open field, either by better organization of the forces in presence, or by the increase of the numbers. In the simulation of the Battle of Legnica we will test the European army (Poles and Allies) adopting the typical Crusader in the Levant battle order, ie staggered on one or both sides or concave but with flanks on discontinuous lines. There will be coordination between cavalry movements, close infantry combat, and fire support from archers.