The link to the mission is:
Blocking Position SPEAR.
This is a single player mission.
Arma 3 requirements: plain vanilla Arma 3 (it may require the helicopters or marksman DLC, not sure).
Player requirements: this scenario is best enjoyed when the player knows how to command a fire team and to use indirect fire and CAS support.
Duration: 45-60 minutes.
This is version 1.0 and may contain some errors.
Your comments are appreciated.