Battle!!

Battle!! is Disc 1, Track 17 on the Xenoblade2 Original Soundtrack. The melody 39 seconds in is based on a part of You Will Know Our Names, and Battle!! (Piano Arrange) is an arrangement of the track for solo piano. The track plays during standard battles in the following areas of Xenoblade Chronicles 2:
 * Argentum
 * Gormott
 * Uraya
 * Mor Ardain (except for the Abandoned Factory)
 * Leftheria (not including the Spirit Crucible Elpys)
 * Indol
 * Temperantia
 * Tantal

It also plays during the following story battles:
 * The King Crustip on Azurda's back.
 * The Lethal Lysaat King on the Ancient Ship.
 * The Wormeater Brog in Gormott.
 * Captain Padraig and the Ardainian Soldiers in Torigoth.
 * The Ardainian Soldier and Sergeant guarding Nia in the Titan Battleship.
 * The Rampaging Ardun in Uraya (when Rex learns to topple using Anchor Shot).
 * The Violent Driver in Fonsa Myma.
 * The Latollo Puffots in Gormott (owned by the children who stole Roc's core crystal).
 * The Tirkin Chefs in Indol.
 * The Tantalese Knights in Tantal's Hall of Mystery.