Wiki entry and watch Flashback 2012. I think it's mentioned in another series the fate of the Megaroad 01 but can't remember where.
The Megaroad-01 set out towards the center of the galaxy in 2012. However in July 2016, barely four years into its voyage toward the center of the Milky Way, all contact with the fleet abruptly ceased. This information was never made known to the general public for fear it would jeapordize all ongoing and subsequent colonization efforts. The many victories and momentous events involving Minmay and the Skull Team during the Space War have been played up over and again to the point of legend ever since, just so everyone not already in the know would believe Megaroad-01 and its fleet are still in active contact with Command. A direct result of this is the release of the film "Super Dimension Fortress Macross: Do You Remember Love" in 2031 to remind the masses of the fragile peace they now enjoy with themes like the near extinction of humanity and some of the momentous events leading up to the end of War with the Zentradi and ending with 'Actual' footage of Minmay's Goodbye Concert Tour.*
In 2025, the Megaroad-13 fleet discovered a habitable planet near the center of the Milky Way. This planetary system was named the Varauta system. In total, 30 of these Megaroad class vessels were built and launched. Production ceased in the late 2020s with the introduction and launch of the first of the New Macross-class colonization ships in 2030. The Macross-7 fleet being the 37th Long Distance Colonization Fleet with Macross-7 being the 7th of the New Macross-class.*
Most of this is mentioned on Japanese Macross sites.