Marley's revenge for Liberio was a counterattack launched by the Marleyan military and Warrior Unit against Paradis Island in retaliation for Eren Yeager's raid on Liberio.
Prelude: With the Founding Titan in Eren Yeager's possession and Zeke Yeager acting as a Titan of royal blood, Paradis Island acquired full potential use for the Founding Titan to awaken the Titans within the Walls and begin the Rumbling whenever necessary as deterrence against foreign invaders. News of Eldia's victory in Liberio was quickly announced to the public, leading to much rejoicing among the civilians with particular praise going to Eren. Funerals were held for the eight Survey Corps soldiers who died in the raid on Liberio, and captives Gabi Braun and Falco Grice were made into prisoners of war, though they would quickly escape from their captivity to wander the southwestern territory of Wall Rose.
Delayed Preparations for the Rumbling: With the Founding Titan in Eren Yeager's possession and Zeke Yeager acting as a Titan of royal blood, Paradis Island acquired full potential use for the Founding Titan to awaken the Titans within the Walls and begin the Rumbling whenever necessary as deterrence against foreign invaders. News of Eldia's victory in Liberio was quickly announced to the public, leading to much rejoicing among the civilians with particular praise going to Eren. Funerals were held for the eight Survey Corps soldiers who died in the raid on Liberio, and captives Gabi Braun and Falco Grice were made into prisoners of war, though they would quickly escape from their captivity to wander the southwestern territory of Wall Rose.
Global Hostility Against Eldia: As Willy Tybur had hoped and planned for, the deaths of countless ambassadors present in Liberio during the raid led to many nations to see Paradis Island as a genuine threat. The major nations pledged support to Marley, forming a global military alliance that was preparing to conduct a scorched-earth operation against Paradis within six months. Despite the international support, Reiner Braun felt that Zeke would not remain idle (due to how little time he had left to live) and knew that the Marleyan army would not strike back suddenly, but take their time to consolidate their forces.
Rise of the Yeagerists: Against the wishes of the Paradis military, several members of the Survey Corps leaked information of the imprisonment of Eren and the volunteers to the public, causing a significant amount of outrage in the civilian and military population alike. Opponents of Eren's imprisonment criticized the military's secretive nature against the public where they had once been proponents of full disclosure. The information leaks were traced back to Survey Corps members Floch Forster, Louise, Holger, and Wim, of whom Floch expressed their collective belief that Eren Yeager should rule Eldia as the Founding Titan and bring their nation to new glory.
Source: Revenge for Liberio, available under CC BY-SA 3.0.