For example, the last time they had exterminated a xenos civilization that the Adeptus Mechanicus had not even had time to catalogue, Horus and Lion El'Jonson had clashed fiercely over which Legion would lead the landing assault.
"The Luna Wolves should lead the assault. We have more Legionaries and equipment, enough to suppress the enemy forces."
"The Dark Angels should lead the assault. My sons have greater experience in breakthrough operations and can reduce unnecessary casualties."
"Are you implying that the Luna Wolves' warriors are inferior?"
"I am merely saying that you have never fought a truly world-shattering war and lack experience."
"Oh, really? I thought the Rangdan Xenocides would have washed away your arrogance. Instead, you are proud of those outrageous casualties? Let me tell you, if the Luna Wolves had borne the brunt of the assault, our losses would have been one-tenth of yours."
With one sentence, Horus ignited Lion El'Jonson's fury. Although angering Lion El'Jonson was not particularly difficult, he was clearly enraged this time. With a forceful heave of both hands, he tore up the holographic command table mounted aboard the warship. It had been cast directly into the vessel as a single piece, embedded firmly within its energy network by its own weight. Even an entire team of tech-priests with meltawelders would need half an hour to remove it.
Yet Lion El'Jonson, in a fit of rage, used both hands to hurl the holographic command table into the air and smash it down upon Horus, whose face wore a mocking expression.
Horus had not expected such a violent reaction from Lion El'Jonson. Caught off guard, he was struck in the chest by the holographic command table and knocked to the ground. His captains and honor guard rushed in from the side, trying to stop Lion