If you're looking for manga similar to Armored Trooper Votoms: Pailsen Files, you might like these titles.
Years after a great war was waged between the portion of humanity that migrated to Mars and those who chose to remain on Earth, a tentative peace has been struck. But not everyone is happy with the status quo. When the Princess Asseylum of Mars makes a diplomatic visit to Earth in an effort to strengthen ties, some see it as an opportunity to reignite the flames of war. Can the citizens of Earth stand against the awesome might of the Martian Kataphrakts a second time?
The manga will begin with an original story that depicts the blank period leading up to the resurrection.
A three-man team of Martian-based Coordinators led by Agnes Brahe commands the Acidalium. The trio gets involved in the second EA-ZAFT War as Agnes controls the Voiture Lumiere-based mobile suit known as the GSF-YAM01 Δ Astray.
In A.S. 106, Five years after the "Vanadis Incident" which denied all Gundams, those cursed Mobile Suits are now roaming the earth.
Universal Century 0096. Three years after the last conflict between Neo Zeon and the Earth Federation Forces, the tentative peace of the Earth Sphere is about to be shattered again. Cardeas Vist, the head of the powerful Vist Foundation, has decided to hand over "Laplace's Box," the secret of the Foundation's prosperity, to the supposed enemy, Neo Zeon. Banagher Links, a student at the space colony Industrial 7, rescues a mysterious girl who calls herself Audrey Burne. Audrey is seeking to prevent a war, but it seems she has come too late. As Banagher's home colony is devastated by the attacks of the enemy mobile suit Kshatriya, he finds his strange destiny and is forced to fight in the formidable weapon system known as the Unicorn Gundam.