The year is Universal Century 0079 and mankind is yet again at war. The space colony Side 3 has declared itself the Principality of Zeon and has separated itself from the Earth Federation. In a raid on the colony Side 7, Zeon troops force a band of civilians, military recruits and one green ensign to escape on a previously unseen class of ship with prototype Federation mobile suits. Among them is Amaru Ray, who piloted the Gundam during the raid on Side 7. Unfortunately, his mastery of it earns him the responsibility of using it in the war against Zeon...
A mysterious abandoned alien spaceship crashes to Earth, offering an unknown and mysterious technology known as Robotech. Humanity unites to rebuild the spaceship, but on the day of its unveiling the rebuilt ship, now renamed the SDF-1, and the rest of the planet are attacked by an unknown alien race of giants called the Zentradi. In the first attack both military and civilians are forced to flee into deep space. The young Rick Hunter, who gets accidentally sucked into the war visiting his friend Lieutenant Fokker on the day of the attack, is faced with some difficult choices. As an ace pilot he could help out defending their new space-based home, or should he instead wait it out on the sidelines? If that isn't enough he also has to deal with his love for the mesmerizing Lynn Minmay, a young girl also pulled against her wishes into the conflict.
Both Robotech and Gundam involve a space epic, mecha technology and battles. Both of these can also be considered anime mecha/space classics, being the forerunners of the genre.
The stories in each show may be different, but there's one thing that they have in common and that is giant mechs. If you liked mech series, you'd easily love this series as well.
From Leiji Matsumoto, one of the classic Japanese sci-fi epics, telling the tales of the Space Battleship Yamato. After Earth is attacked and humanity left with only a year to live after being exposed to deadly radiation, the Yamato is sent on a desperate mission to retrieve technology to save them.
Gonzo does it again with this action-packed mecha comedy. She's an ordinary high school girl. He's a counterterror agent assigned to protect her from those who would steal the information locked in her mind. OK, so she's not so normal after all. Armored Slave battles and lovers' spats abound as Sousuke and his comrades try to track down the mysterious Gauln before it's too late.
I believe that any fan of Gundam (any version or series) would enjoy FMP in its entirety. Unlike Gundam, FMP gets more in depth as far as how the machines work and run from the inside. It's an excellent and underrated mecha series that you should attempt if you like Gundam.
In 2010, the Britannian Empire enslaved Japan using powerful mecha known as Knightmares; in the aftermath Japan was renamed Area 11, and its people began a hard and terrible existence. Lelouch, a Britannian student living in Area 11, has grown up hating the Empire and everything it stands for. One day, in the middle of a terrorist attack, Lelouch meets a mysterious girl who grants him the ability to control minds. Can he use his new power to fight for freedom, or will his hatred twist his good intentions into mindless acts of vengeance?
Ever since Yoshiyuki Tomino's Mobile Suit Gundam changed the face of the mecha genre, every other iteration of the series has featured a distinct take on the original's characters, events and motifs but has the same underlying themes of politics, human rights and discrimination.
Code Geass is the best new Gundam series that never was. The political background parallels the events of the One Year War, right down to the introduction of mobile weapons at a turning point of the campaign. The protagonists Suzaku Kururugi and Lelouch Lamperouge are analogues of Amuro Ray and Char Aznable, and the Britannian Empire bears more than a passing resemblance to the Principality of Zeon.
So before you go joining the Rebellion, see where it all began. If nothing else, watching both series is a good exercise in critical thinking.