It has been 10 years of war.
In Pierce Brown's Red Rising universe, the rebellion begun by slaves three books ago, then carried into the stars by slaves become heroes, become gods, become myths, has nearly been won. Mars and Earth and Luna have been freed from the imperial control of the Gold ruling caste. The green fields of Mercury (just ... go with it) have been won at the cost of a million lives. Venus is all that remains now — stronghold of the Ash Lord, last vestige of the old order. Just one final epic battle, right? Then victory, sweet and eternal.