Unification War

The Unification War was a war that took place roughly 10 years before Ganondorf claimed the Triforce as his own.

The war was between the Dark Interlopers and an army consisting of Hylians, Gorons, Zora, Gerudo, and Sheikah who fought bravely to keep the Triforce out of the Interlopers' grasp.

The Conflict
For a long time, the land of Hyrule lived in peace and prosperity after its creation by the Golden Goddesses; Din, Nayru, and Farore. After the goddesses were finished with Hyrule, they created another parallel world known as the Sacred Realm. Fabled to lie in the center of the realm was a temple known as the Temple of Light. Before departing the realm, the Golden Goddesses left behind the three golden triangles filled with their power, these three triangles when put together would become a larger triangle known as the Triforce.

The Triforce granted the wishes of those who touched it, and granted the one who touched it nearly limitless power. However, the goddesses wished to keep the power out of evil, and so if the one who touched the Triforce was unrighteous, the Triforce would split into three, leaving the one who touched it with the piece representing the force the one believed in most. The other two parts would be given to those destined, these two bearing the mark of the Triforce on their hands. This information was written in the Book of Mudora, a book detailing the history of Hyrule by the scholar, Mudora.

The legend spread across Hyrule, and eventually, the legend spread to a group of black magic wielders, known only as the Dark Interlopers. Greed filled their hearts, and they used their magic, the Fused Shadow, to try and breach the sacred realm and take the Triforce to satisfy their lust for power.