Who among the Primarchs was truly the strongest had always been a hotly debated topic among the people of the Imperium. After all, everyone loved watching electronic cricket fights—even humanity thirty thousand years later was still into that sort of thing.
Some said it was Horus, the First Returned Son. As the lord of the Moon Wolves, he had been personally taught by the Emperor for thirty years. He was practically the Crown Prince, and under his command, the Moon Wolves had conquered countless cities and strongholds. In both civil and military matters, he could be called unmatched.
Others argued that this was changing the subject. They were discussing who was strongest in combat—what the hell did Legion influence have to do with it? By that logic, the Iron Hands were all mechanically augmented and blessed by the Omnissiah.
The Iron Hands were unquestionably the most efficient fleet in the Crusade. Clearly, Lord Ferrus was the strongest! When he went all out, he could even trade fire with a Titan without falling behind.
In short, among the Imperium's eight known Primarchs, each had their own supporters. Every lord had his own fan club, just like a Virtual Idol.
Yet no matter how many rabid fans there were, the spectators—and even most Legion warriors—had a broadly similar ranking in mind.
That was: Horus, Ferrus, and Roboute Guilliman, the three "-us" types, were the top three regulars in terms of Combat Power. Rogal Dorn and Fulgrim had too little data, but they were probably not far off.
The remaining three were more interesting. Princess Alpharius rarely showed herself and had always fought alongside the Son of the Emperor. And with Fulgrim being the Imperium's handsome beauty, they were not even competing on the same track. There was simply no way to compare