Anime/Manga Installments in Chronological Order

Sakura Taisen OVA 1 Ouka Kenran
Sakura Taisen Manga Version
Sakura Taisen TV Series (alternate universe)
Sakura Taisen OVA 2 Gouka Kenran
Sakura Taisen OVA 3 Ecole de Paris
Sakura Taisen the Movie
Sakura Taisen OVA 4 Le Nouveau Paris
Sakura Taisen Su~Mi~Re: Kanzaki Sumire Intai Kinen
Sakura Taisen OVA 5 New York

Humorous/Side Manga or Anime

Sakura Taisen 4 Koma