bridge battles [5.0] is submitted for review.

[smursh]

New map: bridge battles [5.0] by smursh.
Map editor link: bridge battles [5.0]

[smursh]

Final map version.

Adjusted some terrain, changed guard tower set up to prevent bypassing, bridges to lvl-3 ruins, reduced defenders and added artifact to central city to make it more tempting.

Thanks for all the map testers and good feedback from everyone who commented on the previous versions.