Eldia is a fictional nation in the anime and manga series Attack on Titan. It is known for its history of conflict with the neighboring nation of Marley and its unique ability to transform its citizens into Titans through the power of Titan shifters. The Eldians, who inhabit this nation, have faced discrimination and oppression due to their Titan powers. The story of Eldia is central to the plot of Attack on Titan, exploring themes of freedom, oppression, and the consequences of war. The nation’s complex history is intertwined with the fate of its people, leading to significant events that shape the world within the series.