"Take Launcher as Secondary, and resupply it from enemies killed without explosives." - Launched description before Divisions overhaul.
Before the Divisions Overhaul , Launched was the only way to equip a launcher on one's class , and it could be resupplied by picking up bags that would give 1 rocket each.
As of the Divisions Overhaul of April 2018, launchers were now able to be equipped without this basic training , and in order to make this basic training more worthwhile using , it was buffed to give launchers additional rockets (from 1 loaded and 1 in reserve to 1 loaded and 3 in reserve).
However , launchers could not be practically used against infantry as they were nerfed to have less damage and a smaller splash damage radius (the Panzerschreck required an almost direct hit to kill infantry) to prevent launchers from being used to easily kill infantry, resulting in Launched being buffed again in the 31st May 2018 patch.
Launched now not only has the two previous benefits of being able to carry more ammunition and allowing launchers to be resupplied , but now boosts launcher damage by 30% , similar to a weakened form of Danger Close in other titles.