A military exercise mistakenly transports a contemporary army back to medieval Japan. The actions of this group in the past start influencing the present, prompting another team to be sent to recover them. However, the leader of the misplaced unit has different intentions; he intends to exploit his advanced technology to seize control of Japan and alter his nation's fate.
Sengoku Jieitai 1549 was published in English as Samurai Commando: Mission 1549 by CMX Manga from July 11, 2007 to October 31, 2007.