Mobile Suit Gundam, Ginga Eiyuu Densetsu Recommendations
Both uses military tactics during large fights and combat, both are about 2 sides fighting for their ideologies (kind of...), both are very old anime.
Both anime are set in a far future in which humanity has colonized space, and both focus on an intergalactic war between two sides with opposing ideologies. Apart from plot similarities, there's also a huge similarity between two of the main characters in both anime, Char Aznable and Reinhard von Lohengramm, as they both have similar personalities, backgrounds, and motivations.
Both anime are centered on intergalactic warfare.
When humanity has travelled out to space and explored and civilized space,
humanity suddenly splits. Republicans vs an Empire.
When both fractions meet in space the soldiers realize that they are fighting for the same values but both live in a different fraction and have to overcome their ideals that strive them and need to fight to protect the people they love.
Love, war and politics are the themes of both anime.
These are the Star Wars of anime.