"Samurai Warriors 2 Empires (戦国無双2 Empires) is an expansion to the original Samurai Warriors 2 and the third Empires expansion by Koei (The first was Dynasty Warriors 4: Empires, and the second was Dynasty Warriors 5: Empires), available for PlayStation 2 and Xbox 360. The game was first released in Japan on November 16, 2006.
Very similar to both Dynasty Warriors 4 Empires and Dynasty Warriors 5 Empires, the game features the strategic and tactical Empire Mode that combines the gameplay of Samurai Warriors and several turn-based strategy elements from Nobunaga's Ambition and Romance of the Three Kingdoms. The Empire mode allows the player to select from some of Japan's greatest battles such as the Battle of Kawanakajima, the Battle of Anegawa, the incident at Honnō-ji and the Battle of Sekigahara."
Source: Wikipedia, Samurai Warriors 2 Empires, available under the CC-BY-SA License.