Repeating the trick used for their previous LTP product, the art department decided to use this wraparound image for the product packaging of Training Grounds II. LTP (that Learn to Play) products usually appeared once for each legality arc, near the release of the basic set for a given story arc (in this case, Lotus Edition, or The Age of Enlightenment). Again they usually featured a more discrete conflict, limited to two factions. In this case, they were the Crane and Dragon Clans, and the conflict was called the War of Silk and steel.
This widescreen artwork, by newcomer to L5R Miguel Coimbra, was also used to illustrate several cards in the set so that, if you put them together, you could see the dramatic scene come to life, with both army leaders in the center.
Miguel Coimbra would go on to create a lot of art for L5R cards, and has created also many illustrations for gaming products that any tabletop games will easily recognize: https://www.miguelcoimbra.com/