Complete story — includes the ending
Three years prior to Eren's raid in Liberio against Marley, the Scouts had captured the first Marleyan scout ship that came to Paradis. Crew-members Yelena, Onyankopon, and other Marleyan-conscripted deserters, called the "Anti-Marleyan Volunteers" after Marley destroyed their home nations in war, offered help, backing Zeke's plan to carry out the Rumbling in order to beat Marley. Over the next three years, they provided the Scouts the technology and knowledge of Marleyan guns and weaponry, helping them upgrade their own gear. The Scouts capture more Marleyan scout ships and recruit the Marleyan soldiers as labor to build docks for the island. In the present, the Scouts grieve Sasha, including Marleyan captive Nicolo, a chef who cooks for the Scouts. Commander Pyxis has the Anti-Marleyan Volunteers detained after the raid in suspicion. Armin reflects to the crystallized Annie on whether helping Eren in the raid was the right decision as war has now become inevitable, but acknowledges that they had no choice, as Marley would've otherwise attacked and beaten Paradis with their stronger forces. Gabi, Falco, and Eren are all imprisoned.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Attack on Titan season 4. Reference markers and HTML formatting removed. · Content license