Holding the Line Technology ID
The research ID for Holding the Line in Hearts of Iron IV is mountaineers_combat_1.
Holding the Line
Special Forces Doctrine
Unlock this technology with the research command and the tech ID mountaineers_combat_1.
About this technology
Our elite forces must focus their efforts on holding the areas in which they specialize. A combination of ambush tactics and improved regimental organization ensure that our special forces present a significant defense-in-depth against invading forces.