I notice the mine counters in AtB have a red DR of 15. What is this used for? I find no mention of its use in the rules for AtB or the Solo Expansion.
From the Awakening the Bear 2nd Edition rulebook:
18.4 Fortification and Obstacle Destruction
Fortifications and obstacles with a red number in the bottom right
hand corner of their counters can be cleared or destroyed by mortar
fire, artillery fire, red tank fire or CC attacks from squads. The DR
of a fortification or obstacle is modified by any terrain DM, including
woods, buildings and smoke. When a fortification or obstacle is hit, it
is removed from the game.
Attacks are resolved simultaneously (but rolled individually)
against the target unit(s) and the fortification or obstacle. If a
fortification is destroyed, units inside of it still receive the fortification’s
DM for that turn’s attack.
Units in fortifications defend with their flank defense against
flank, artillery/mortar, and CC attacks as normal.
A player may attack an empty fortification or obstacle, in an
attempt to destroy it.