It soon leading Cuban soldiers engaging in frontline military combat. Three divisions were ultimately responsible for manning the frontline defences opposite the Canadian Corps. Another role was the pursuit of retreating enemy forces during major frontline operations and breakthroughs. The PMCs' snipers killed a number of competent GNA mid-level commanders along the frontline. Half of frontline hospital staff were offered no training in smoking cessation. War experience prompted changes to the way frontline forces were organised. This would allow him to see active military service again on the frontline in Afghanistan. The Red Army would prepare by pinpointing the Finnish frontline fortifications. Evidence for their close relationship was found in the accounts of frontline soldiers. Continuously keeping units on the frontline needlessly wore them out. FBR trains teams of men and women in frontline medical treatment and reconnaissance techniques. As of 2016, 200,000 K2C1s are in service with frontline troops. By 1916, the helmet was no longer in use by frontline soldiers. They could not offer the air support needed at the frontline. The Japanese were trained on several, such as the Gloster Sparrowhawk, then a frontline fighter.