Panzer World Galient OVA Collection
The first (大地の章 Daichi no Shō, "Chapter of the Land") and second (天空の章 Tenkū no Shō, "Chapter of the Sky") OVAs are in fact recaps of episodes 1-13 and 14-25 of the TV series, respectively, while the third one (鉄の紋章 Tetsu no Monshō, "Crest of Iron") is a spin-off that has its own storyline and different versions of the series' characters.
Panzer World Galient: Chapter of the Land (1986)
21 January, 1986
Recap of episodes 01-13 from the Panzer World Galient TV series.
Panzer World Galient: Chapter of the Sky (1986)
21 March, 1986
Recap of episodes 14-25 from the Panzer World Galient TV series.
Panzer World Galient: Crest of Iron (1986)
05 August, 1986
Alternative universe spin-off of the 'Panzer World Galient' TV series