Mine warfare can deny movement without giving the side that laid the mines freedom to manoeuvre. When both sides lay mines, the combined field can leave neither side certain of a safe route. That uncertainty helps a defender close a choke point. An attacker still has to clear or find a passage before exploiting the sea space beyond.
Notable Point · 1:19:37-1:20:16
Minefields can trap both sides
Mines are powerful for denial, but overlapping friendly and enemy fields can restrict the side that laid them as well.