If you're looking for manga similar to Wombs, you might like these titles.
Takagami Riu graduated from middle school. All of his dreams as a normal student had vanished - he was assigned to become a student soldier "Gakuhei" and filled his life with trainings. After the hard training session, Riu was called by instructor and appointed as a "Body Guard", demanded from a magician officer. "Why it has to be me?" Riu asked this question to himself, and what awaits for him was a cute girl that dressed weird.
The Weapon Of Raid Machines (WORMS), which once devastated the Earth, have been sighted once again, and three young girls are chosen to save the Earth from destruction. Aboard the secret vessel number 113, the Koryu, Sonic Diver Unit team members Eika, Otoha, and Karen help protect Earth against the Worm threat with their flying exoskeletons.
Follow JSDF officers Yamato Yoshikazu and Sakimori Konoe as they face off against monsters of unknown origin that infest the troubled, disputed waters of the East Asian sea and have humans as a preferential prey!
Centers around a platoon of the Earth Federation Forces set in North America at the end of the One Year War.
The story revolves around Objects — powerful, massive weapons that change the course of warfare — and Elite Object pilots. An odd Elite girl named Milinda meets Quenser, a student who aims to become a Object mechanic, with the soldier-in-training Heivia on a snowy battlefield
Yukikaze is just a young girl but her and her friends have the incredible responsibility of being the naval force of her nation. As part of Seiran Team 3 of the Wadatsumi naval base, Yukikaze and her female friends, Isokaze, Nowaki and Takao, all attend the naval academy. But in this world, they do not work on ships, instead, they themselves are the weapons, able to travel across oceans at high speeds and engage in warfare using their equipped artillery. When an enemy nation attacks the base to take control of an important strategic point, only Yukikaze is left standing and all hope seems lost when a beautiful woman named Taiwa appears with the secret weapon to defend Yukikaze and the naval base.