Broadside is a huge loser. He's the forgotten Autobot Triple Changer who turns into either a tiny aircraft carrier and a jet, or an impossibly large "jet" and an aircraft carrier. Broadside also happens to be terrified of heights. And gets seasick on the water.
His life must suuuuuuck.
Broadside and his fellow Triple Changers were late recruits into Operation: Volcano by Emirate Xaaron, taking the place of Ultra Magnus in the battle scenario. Their introduction into the Wreckers was marred with tragedy, however, as their leader Impactor was killed when Volcano finally went down. Broadside's fellow Triple Changer Springer succeeded Impactor as squad leader.
Broadside served on several missions with the Wreckers, battling zombie robots in Kalis and engaging the future Decepticon Galvatron on Earth. That last mission nearly proved to be a disaster, however, when the Wreckers blindly portal-jumped into a battle with Galvatron, only to find themselves in the middle of a populated human city, surrounded by potential civilian casualties. In order to guard against future problems such as that, Xaaron assigned Broadside, Inferno and Sandstorm to Earth full time as an advance guard, gathering information on the planet so that they would be better prepared for the next battle with Galvatron. The three Autobots engaged in some rather comical situations while on Earth, including fighting a cute-but-dangerous Firebug, and nearly causing a panic when they tried to celebrate Christmas with a bunch of humans.
The trio's mission became serious once the timestorm raging at both ends of Galvatron's time-jump began to tear apart the fabric of the universe. Xaaron had isolated Galvatron—and his time-tossed minions Scourge and Cyclonus—as the source of the distortion, and sent the full contingent of Wreckers to Earth, complete with unexpected back-up from their Decepticon counterparts, the Mayhem Attack Squad. Broadside balked at the idea, but honestly...they needed all the help they could get. Even that wasn't enough, however, against the combined might of Galvatron and Megatron. The twin titans tore through the Wreckers and Mayhems without mercy: at the end of the so-called "Time Wars", less than half of the warriors were left alive.
Cut off from any supplies or assistance from Cybertron, Broadside, Springer and Inferno felt left behind and abandoned to their fate on Earth. In order to survive, they formed a new group aptly known as the "Survivors" with the limbo-lost Autobot Skids and the remaining Mayhems, Carnivac and Catilla. Unfortunately, the Mayhems' former superiors on Cybertron didn't take kindly to this apparent mutiny, and assembled a new Mayhem Attack Squad to assassinate the traitors. Their first strike led to Catilla's death, and Carnivac ran off on his own afterwards to seek vengeance.
In 2510, Broadside was fighting alongside Springer and the Wreckers when they fired the very last shots of the war between the Autobots and the Decepticons. Of course, a war between the Autobots and the Autobots started up almost immediately thereafter, so it was a pretty quick shore leave.
In order to take on the Mayhems effectively, Broadside and the other Survivors joined up with Grimlock's Earthforce, and came to Carnivac's rescue just in the nick of time. Later on, the Earth-based Decepticons under Starscream and Soundwave attempted to divide the Autobots' attention, staging a full-scale assault on Earthbase while Starscream secured a tanker full of fuel in the meantime. While the main Earthforce defended their base, however, the Survivors fought back Starscream's energy-stealing attempt. Broadside used his rarely seen carrier-mode to transport his fellow Survivors into battle on the high seas against Starscream, and the Seeker was driven off without much effort.
|“||Oh, yes. The building - and occupants - are toast! Maximum points!||”|
—Broadside, armed to the teeth and entirely too happy about it, "War Without End!"
Broadside served with Sideswipe, Hound and Blades as part of a team of Firestormers under Grimlock's command. They attacked their enemy with so much zeal, that Grimlock had to remind them what side they're on. Broadside and his Firestormers team were the first to uncover the existence of Jhiaxus and his Cybertronian Empire and alert Optimus Prime to its threat. However, Jhiaxus' command ship, the Twilight blasted them from orbit and kept Broadside and the others prisoner until Optimus Prime and Grimlock managed to set them free and escape. Broadside continued serving as a soldier throughout the Autobots conflict with the Cybertronians. He was last seen fighting alongside Springer and several other veteran Autobots on the planet Ethos.
When Teletraan II casually brought up in conversation that Trypticon, the Decepticons' largest weapon of mass destruction, had not been destroyed as everyone thought, Rodimus Prime sent Broadside and Seaspray out to investigate the site where Trypticon fell into the sea. Sure enough, they found no body, but instead a trail of massive footprints leading back towards land. Once the Autobots tracked Trypticon down to the Socialist Democratic Federated Republic of Carbombya, Broadside transported the Autobot strike force in by the coast.
Broadside was among the Autobots attending the unveiling of a generator on Cybertron when the Decepticon anti-electron attack was unleashed.
At a time when the Decepticons were carrying out a series of assaults on the nation of Japan, Broadside confronted Devastator and Predaking in the waters near a fishing village. Broadside nearly capsized a small boat due to the waves generated by their fight, but he managed to stabilize the craft before returning to battle. After which the Constructicons retreated in their induvidual robot modes (perhaps the massive waves made the attacking combiners seperate).
Broadside appeared briefly fighting alongside Springer and Sandstorm in defense of Autobot City on Earth.
During the first arc of Optimus Prime's tenure as leader of the Autobots, Broadside was an enormous warrior, as tall as the special combiner teams, and supposedly nearly as powerful. He helped defend the Autobot capital of Iacon, alongside Vibes.
A few thousand years after that, Broadside, now the size of a standard Transformer, was a member of the Wreckers fighting for control of the Tagan Heights region. Most notably, he organized the evacuation of his team when Devastator and Defensor were decimating the area. Possibly, Broadside had himself reduced after the signing of the Crisis Intervention Accords to keep his combat status nominal.
In the modern era, Broadside was one of the Autobots upgraded into a Triple Changer by Shockwave's new process, after the Autobots and Decepticons negotiated a truce following the Great Shutdown. Along with his fellow former Wrecker Sandstorm, Broadside served as part of Shockwave's Triple Changer Strike Force alongside the Decepticons Astrotrain, Octane and Blitzwing. But, while Shockwave was making many promises of a new world order where Autobots and Decepticons could live forever in peace, Broadside eventually concluded he could not be trusted. As a result, Broadside and Sandstorm made contact with Smokescreen and Tracks in the Autobot resistance, and began reporting of Shockwave's activities.
Broadside was there. He saw it happen. The conquest of Kaon. The fall of a Prime. The beginning of the Great War. Broadside was there, and amazingly well armed for such a "peaceful" period, though perhaps he took a clue from Sentinel Prime. Either way, the huge old bot was one of the survivors who managed to evacuate before Megatron's takeover.
Around four hundred years ago, Broadside was attempting to defend Autobot territory on Cybertron from Decepticon expansion. He was part of a unit alongside Kup, Getaway and Huffer shortly after the Battle of Thunderhead Pass, stuck in the trenches on what was left of Cybertron after Thunderwing stomped through it.
In the present, Broadside was a member of the elite combat unit "The Wreckers". He was assaulting the Decepticon Seige Armature on Varas Centralas alongside Whirl and Sandstorm when Springer received orders from Optimus Prime to pull out and return to Cybertron. After Optimus and the Wreckers quickly crushed Bludgeon's cult, Broadside reported that Thunderwing was coming back. When Thunderwing touched down on Cybertron, Broadside, Scoop and Roadbuster operated as advance recon, watching as the monstrous Pretender slowly erupted into a rage as memories of his past flooded what was left of his mind. Broadside had to pick up Scoop and run for it as Thunderwing unleashed a massive wave of energy. After Twin Twist managed to get himself into trouble, Broadside's team were tasked with getting his attention, but were blown away with a mighty clap of his hands. After recovering from having a pocket of gas detonated from underneath them, Broadside and the remaining Autobots fought alongside two squads of Decepticons and reprogrammed Centurion droids to help defeat Thunderwing.