The Solar Empire sattelite weapon was made to bring down the sun's power to stop the Iron Leigion from becoming a world ruling nation. As the Solar Empire were near defeat, a surviving staff bearer retrieved the staff to activate the weapon. He joined survivers and got through Lord Ferrock's defences. They made it to Ferrock's strong hold, the Iron Tower, where the super weapon was activated and Ferrock was defeated. Then in shame the Solar Empire's empress hide the staff away forever.
In Battalion Wars 2 it is revealed in the Tundran campaign that the staff is hidden in the Tundran Terretories.