Villa 's División del Norte outnumbered Obregón 's Constitutionalists 2:1 , but Obregón had lured Villa far from his communication and supply Supply lines to a field with existing Presence canals and trenches .

The operation required Imposing_obligation the seizure of the bridges by airborne troops across the Meuse River , two arms of the Rhine ( the Waal River and the Lower Rhine ) , together with crossings over several smaller canals and tributaries .