After the event of Junius Seven crashing into Earth, wars and chaos have spread throughout humankind once again. Sven Cal Bayan, a 19 year old natural and a part of the special forces named "Phantom Pain", pilots the Strike Noir to destroy all coordinators. Selene McGriff, a researcher for the Deep Space survey and Development Organization, escapes from Earth and continues her project of Stargazer. Unknowingly, their destiny will cross and new battles will begin.
If you watched either Code Geass Akito the Exiled or Gundam Seed CE 73 Stargazer, try either one because they are similar due to being side stories in the main stories (Code Geass: Lelouch of the Rebellion and Gundam Seed Destiny), male lead and female lead are similar (Japanese and Britannian & Natural and Coordinator), Military faction that is a squad (Wyvern and Phantom Pain), dark tone, suspense, and both show's morality is the opposite way around.
War between the Earth Federation and Zeon has ground to a bloody standstill, and both sides eagerly seek a quick resolution. Among these is Ensign Shiro Amada, a young mobile suit pilot for the Federation assigned to the 08th mobile suit division in the heart of the Vietnamese jungle. The members of his team include Karen, a hot-headed pilot and part time mechanic; Sanders "The Reaper," a pilot with a reputation for getting the people in his unit killed; Eledor, an aspiring musician, flirt, and communications officer for the team; and Mikel, the love-struck driver for the team's command vehicle. As the gravity of war bears down on their shoulders, they must struggle to keep their sanity amidst a chaotic battlefield that continually tests their wit, focus, and resolve.
If you like Code Geass Akito the Exiled, then you should also like Mobile Suit Gundam 08th MS Team because both show's timeline are exact, are side stories to their parent stories, military factions between the resisting faction agains tyrannical faction ruled by nobility, Mecha are fought in land more often than air, space, relationship between male lead and female lead are similar (Japanese and Britannian & Earthnoid & Spacenoid), character cameos from the main series, darker tone, and relationships that involve drama, feud, and love that will later bring out conclusions that will probably shock the series.