Having seized two-thirds of the front-line territory in the Flowing Light Retrospective World, the Evil Tide Civilization could be said to have pushed this Dimensional Hegemony two-thirds of the way forward.
According to the rules of Dimensional Hegemony investigated by Secluded Bamboo Supreme and the other Evil Tide high-level figures, generally speaking, once one side participating in a Dimensional Hegemony occupied all of its opponent's positions in the Dimensional Battlefield, it could basically be judged the victor!
Of course, history also held no shortage of cases where top-level civilizations, after achieving victory in Dimensional Hegemony, began to wipe their opponents out completely.
Mercy toward one's enemies was cruelty toward oneself.
Besides, taking all the territory in the Dimensional Battlefield did not necessarily mean one had truly met the conditions for victory in a Dimensional War.
As for Dimensional Hegemony and profound ultimate truths such as Across the Astral Realm, the vast majority of top-level civilizations, including Ultimate Body Civilizations like the Evil Tide, did not dare claim to understand them thoroughly.
Much of the time, they could only judge based on experience and existing historical cases.
In any case, after the Three Supremes of the Evil Tide Civilization decided upon this Dimensional Hegemony and confirmed that their opponent was the Decayed Civilization, they had already prepared to wipe them out completely.
They would even, in the later stages of the war, take the initiative to enter Decay Time-Space and wage an extermination war against this Ultimate Body Civilization.
Of course, whether the Evil Tide Civilization would suffer rule backlash from cross-time-space incursions at that time was also an important factor they would rely on in deciding whether to uproot the Decayed Civilization entirely.
If there was not even any rule backlash from Cross-Time-Space Battle... then that meant the Dimensional Hegemony