Known primarily as an agricultural planet, Hassaria’s surface largely consists of expansive grasslands and open fields with beds of rich volcanic soil. Pockets of geothermal energy dot the landscape, keeping the planet warm enough to yield multiple crops per year, while its hydrosphere is composed of a uniquely complex system of natural groundwater flows. This allows Hassaria to be one of the leading suppliers within the agricultural industry, providing high-quality produce to dozens of neighbouring systems. Dust corn is the planet's main export, while gapanga fruit and goat grass account for smaller yet still profitable commodities. Revenue is also gained from the tourists and scholars who visit the planet to explore the largest library in the southern hemisphere of the galaxy, the Veeshas Tuwan. As if seeping out from the many texts and scrolls hidden in the library itself, a modest intellectual community continues to grow and thrive around the monolith, providing a diverse level of class and education that varies greatly from the various farming settlements that dot the majority of the planet’s surface.

The planet of Hassaria is home to the Hassarian species, a race of sentient bipeds whose willowy bodies and long snouts were covered in lilac fur. Both the people and their homeworld were discovered during the early years of the era in galactic history known as the High Republic. In the later years of this era, the Hassarians came into conflict with another local species known as the Skembo, which led to a rivalry that lasted several decades and entailed many political intrigues and schemes between the two races. In the centuries that followed, Hassaria and its star system remained loosely affiliated with the Galactic Republic until the emergence of the Confederacy of Independent Systems in the Clone Wars. Both Hassaria and Hassaria II became important agricultural strongholds for the Separatists, which resulted in a massive and destructive offensive by the Republic during the Outer Rim Sieges.

The Republic’s vicious offensive resulted in more than half the precious farmland on both Hassaria and Hassaria II being destroyed, with many Hassarians having been displaced from their homes and cities. After the emergence of the Galactic Empire, the Hassaria system was abandoned and its people were left to fend for themselves. Its natives withdrew from galactic society thereafter and focused on rebuilding what was lost at the hands of the Republic. The new Hassarian government became much more protective of its worlds and isolationist in its policies, favouring and promoting customs and traditions from before the High Republic era, such as the annually recurring and globally celebrated harvest festival, during which gratitude is expressed for life's enduring cyclical nature. As such, Hassarian society grew to become insular and distrustful of outside influences, and it was only after the new Confederacy of Independent Systems gained authority over this sector of the galaxy that the Hassarians resurfaced from their decades of isolation, albeit grudgingly.