Gruelling Training Regimen Technology ID
The research ID for Gruelling Training Regimen in Hearts of Iron IV is marines_recon.
Gruelling Training Regimen
Special Forces Doctrine
Unlock this technology with the research command and the tech ID marines_recon.
About this technology
Nothing prepares a man for war, but our combat instructors assure us they can come close enough that only the most hardened recruits make it to where it counts.