Location from Attack on Titan by Hajime Isayama
Southern district of Wall Rose. Site of humanity's first successful counterattack against the Titans — where a boy plugged a hole in the wall with a boulder and changed everything.
Trost is Shiganshina's echo. Another protruding district, another gate, another day the Colossal Titan appeared and kicked through the door. But this time, something different happened. Cadets fresh from training — kids, really — held the line long enough for Eren Yeager to transform into a Titan for the first time and seal the breach with a massive boulder. The cost was staggering. Entire squads wiped out in minutes. The streets ran with blood and the air stank of Titan steam. But the gate held. Trost became proof that humanity could fight back, even if the proof was written in the names of the dead. The district bears its scars — rebuilt walls, memorial markers, and residents who flinch at loud noises.
Also known as: Trost, the Trost gate