A novel where mc probably transmigrated Or rebirth where he is on the road to become a general or military authority. He has a system where after completing task or battle it improves his strength. I read a novel like that few years back, forgot the name of it. I hope someone can recommend similar ones. Where system helps mc to level up and upgrade his skills step by step. And help him save his comrades as well. Male mc novels Without cp is fine as well.
Someone will probably recommend Youjo Senki Knights and Magic Grimgal of Ashes and Illusion Amber Sword The Second Coming of Gluttony ... but they don't (completely) fit your criteria.