Read Hiraheishi wa Kako o Yumemiru Manga Online
It details the life of a mid-rank soldier who died at the very end of the war against the Demon Race. Fortunately for him, he wakes up to find that he’s a baby again, in the embrace of his real mother, years in the past. Determined to avoid the chain of tragedies that took his beloved ones away from him, he takes advantage of the advancements in swordsmanship and magic that developed during the war (as we all know, wars are when many scientific breakthroughs tend to happen), and tries his best to prepare for the demon invasion as well as strengthen himself with maximum efficiency. Description taken from Hot Chocolate Scans.
Alternative name(s)Hiraheishi wa Kako wo Yumemiru
평범한 병사는 과거를 꿈꾼다