Rinne no Lagrange - Akatsuki no Memoria Manga

This manga is related to the anime, "Rinne no Lagrange", although it has a different storyline.

Oda Nobuna no Yabou Manga

Suddenly finding himself in the Sengoku era, regular high school student Sagara Yoshiharu is about to be killed in the battlefield. He is saved by none other than the man who later becomes the infamous Toyotomi Hideyoshi but at a cost to his life. With history completely changed because of Yoshiharu’s actions, he tries to make things right again but it seems that history is taking a different course than the one he learned in school. Oda Nobunaga is now a brilliant but young girl named Oda Nobuna.

Nejimaki Seirei Senki - Tenkyou no Alderamin Manga

The Katjvarna Empire, in a state of war with the adjacent Kioka Republic.
In that region, due to certain circumstances, there was a certain youth unwillingly preparing to take the High Grade Military Officer Exam. His name, Ikta. Disliker of war, lazy, admirer of women. No one predicted that that kind of Ikta would later on become a soldier referred to even as a great commander. Ikta, the one who survived a world embroiled in war with his superior genius.
The curtain is raised at last on a splendid fantasy military history illustrating his stormy, dramatic life.