Vault of Fathers

The Vault of Fathers (Arh'buir) was a massive, ancient vault located on Mandalore, some 5,000 kilometers from Keldabe. The vault was built into the side of a conical hill, which was surrounded by small scattered villages. Although it remained undiscovered for centuries, it's existence was well-known in Mandalorian media since its construction during the reign of Mandalore the Uniter (c. 1040-1000 BBY)

The vault's contents included armor sets, weapons, records, garments, and other artifacts that once belonged to dozens of recognized Mand'alors. Vehicles such as Basilisk war droids were also present in low abundance.

History
The Vault of Fathers was constructed during the later reign of Mandalore the Uniter, who dedicated much of his reign to preserving Mandalorian history for future generations. Security droids, designed to remain active for centuries with an extremely rare and efficient power source were stationed throughout the vault, though became defunct overtime. For centuries, the vault remained undiscovered (despite active villages surrounding the hill the vault was built into), and thousands of Mandalorian warriors sought the treasures within without success. During the Republic's invasion of the Mandalore system, the vault's location was discovered by passing Republic bombers, and a company of clone troopers was soon after deployed to secure the hill. A Mandalorian insurgent discovered and reported these plans, and a group of Mandalorian warriors was quickly assembled to intercept the incoming troopers, who were also supported by walkers and hovertanks. Although the insurgents were outnumbered, locals from the villages, armed with vibroswords and slugthrowers, gathered to assist the insurgents and managed to repel the company's assault. Fenn Shysa immediately stationed a force of Supercommandos at a nearby encampment and set up a large shield generator to protect the hill. Over a decade later, a small force of Imperial Army troopers, complemented by bombers and AT-AT walkers, launched another assault on the position, though this attack was repelled with heavy casualties and every walker present destroyed. Offices were constructed in the vault, and the vault became a command center for the Mandalorian resistance as several chieftains and military leaders, including Fenn Shysa, often met in the vault's upper level to discuss strategy, progress, and politics. At some point prior to the start of the Galactic Civil War, Fenn Shysa appointed Naastau to oversee Supercommando forces in the area. During Naastau's command, the vault was once more attacked by a much larger force: about a company of stormtroopers and a battalion of Imperial Army troopers. Imperial commandos also managed to infiltrate the encampment and disable both the shield generator and the encampment's communication systems, though the commandos were confronted and eliminated and the defense systems were reactivated. The Mandalorians managed to hold out in their position for over a month before they were forced to retreat with only some remaining men. The vault, the hill, and surrounding villages were then secured by Imperial forces and the vault's contents were emptied and hauled off to an unknown off-world location. Some of the vibroswords and at least one war droid that were once in the vault, however, were found on a Ord Mantell black market some years later, indicating that the Imperial transports carrying the artifacts may have been attacked by pirates aligned with the Black Sun. The area remained under Imperial control until it was eventually liberated by another force of insurgents, after which point the vault was repurposed as a bunker and continued serving as a meeting center between clan chieftains and politicians.