Frontline (MOCHIZUKI Mikiya)

(from ebookjapan):

World War II. Mickey, the son of Japanese immigrants, volunteers to fight in the Second Gen Corps as a member of the Allied Forces in order to free his mother from internment. Although he is ridiculed as a "Jap" because of his Japanese appearance, Mickey dives into a hail of bullets more bravely than anyone else.

He teams up with Tank Commander Leo and successfully destroys an enemy destroyer! Then, he discovers children being taken away by the Nazi SS. He tries to save them, but the enemy soldiers find them...?