Vos is one of Cybertron's many city-states. It borders Tarn, presumably close to Iacon's borders. Vos is rich in energy sources, granting it independence from the other city-states.

Fiction

Generation 1 continuity family

Marvel UK Comics continuity

Starscream was the figurehead of the ruling body of Vos prior to the city's destruction and the outbreak of the Great War. At this time, the city-states had grown hostile to one another in a fight over Cybertron's dwindling energy sources and Vos was no exception; like all the large cities, it monopolised resources and just like Tarn, it used them to build up a vast army. Vos agreed to a plan of the Overlord of that era to hold gladiatorial matches to settle disputes peacefully and bring the city-states together, but only to keep itself unsuspicious.

One night, the soldier-gladiators of Vos broke into Tarn's power plant, which had been staffed minimally ever since the Games had commenced, with the intent to blow it up. The full plan was to plant evidence of Iacon's involvement, which would bring the two city-states to war and leave a power vacuum for Vos to fill up, at which point it would conquer the planet! That latter part was thwarted by the unexpected arrival of the plant's second engineer, who was murdered by the saboteurs, but not before he had contacted security.

Despite the warning, Vos managed to place and detonate the explosives, violently illuminating the power plant's surroundings shortly after the agents got home safely. Yet because Tarn knew who was really responsible, the plan had failed and Vos was declared war to rather than Iacon. The hostilities that followed between the two city-states forced many of their inhabitants to flee to other cities, among which Iacon. Iacon provided for the refugees, but its council refused to put its own troops at risk by interference in the conflict, going so far as to suggest that maybe it was in Iacon's interest to see the two city-states gone.

Tarn and Vos eventually destroyed each other when they launched a photon missile each at the same time. Megatron recruited many of the survivors into his new Decepticon army by laying the blame on Iacon, which could have stopped the war. State Games

The Official Transformers: Generation 2 Annual

Sideswipe used to be a member of the civil defense forces of Vos. The city was destroyed by a Decepticon attack, giving Sideswipe a motivation to join the Autobots. Sideswipe's The Official Transformers: Generation 2 Annual profile

2005 IDW continuity

The "Disappeared" Transformers Freeflight, Ice-Vent, Katastrophus, Lookout and Wheelfire all hailed from Vos. Anomie As Megatron recruited his Decepticon army from the gladiatorial games, he mentioned some of the home cities of the combatants, including Vos. Megatron Origin #3

Vos was invaded by the Decepticons early during the war The Death of Optimus Prime It was one of the First Five Cities to fall to them. Life After the Big Bang At one point Impactor assaulted the Decepticon-held Vosian Citadel. Bullets

Beast Wars: Uprising

Vos was located in Cybertron's northern hemisphere. During the Grand Uprising, it became a contested battlefront, pitting loyalist Builder forces against the Resistance. Safe Spaces Some Builders and their loyalists chose to flee into the neighboring city of Iacon to the north, including Twirl. Trigger Warnings

War for Cybertron Trilogy marketing material

During the war for Cybertron, Vos became the location of Decepticon Air Command—home to the Seekers that patrolled Cybertron's cities. In the midst of the war, the Decepticon, Starscream, rose to prominence among his fellow Seekers, becoming their Air Commander. Siege Teletraan-1 Data Files

2021 IDW Beast Wars comic

In the era of the Maximals and Predacons, Vos was home to the Great Shipyard, where transwarp capable starships were held. Some Predacon separatists blew it up to steal an escape ship. Savage Landing Part 1

Live-action film series

Vos is the home city of Grindcore. Grindcore's toy bio Vos lies surrounded by Tarn, the Neutral Territories, the area where the Orbital Beta Platform, Perihex and the area housing the Launch Pad. Risk

Aligned novels

Vos had a great rivalry with its neighbor Tarn. To pacify the two states, Vos was made the base of the Cybertronian Air Command. It was neutral in the civil war despite Starscream's support for Megatron, until Shockwave seized control. Engaging in some power politics, Shockwave requested the Air Commanders bomb those areas of Tarn he blamed for sheltering Autobots, before a mysterious missile strike was launched on Vos, eliminating the Air Commanders and Starscream's support. Surviving Seekers became the Aerialbots. Exodus

Merchandise

• Risk: Transformers — Cybertron Battle Edition (2007)

Vos is one of the blue zones on the board.