To destroy a Bridge:
1. Fire guns at it - the Firing Method
2. Melee it with infantry - the Melee Method
For #2:
Move adjacent to the bridge with ONE infantry unit per entrance hex for bridge assaults. Select the bridge. Pull down the Melee menu and select the Begin Melee option. Select the infantry unit, pull down the Melee menu again and select "Add to Melee" then you can use the toolbar button to Resolve Melee. You can only attack a bridge with one unit per entrance hex per turn and only melee the bridge one time per turn. The program assumes that only ONE infantry unit can ENTER a bridge per turn and this spills over into the Melee process.
So you can use TWO units to melee a bridge per turn using the two entrance points. You obviously do not want to leave one infantry unit stranded on the other side of the bridge so before the bridge strength drops below 50 points, move the infantry unit over to the "friendly side of the river" and then melee the bridge from one side to finish it off. You will only be able to use one unit but that melee will reduce the bridge to below 50 points and thus no units will be able to cross and you will have accomplished your mission.
Continue meleeing the bridge every turn until it reaches ZERO points. Once it does it will disappear and no unit can cross at that point unless you use Pioneer units to ferry infantry across.
But the key here is to use the Melee menu. You have to do the "Begin Melee" process first and then add in the attacking infantry. Hope this helps, Garrett!
