Marley's Soldiers

Based on Hajime Isayama's manga, Attack on titan, chapter 92.

After the failure of Marley's operation on Paradis Island to reclaim the Founding Titan, and the loss of two Warrior Titan shifters, the nation's military capabilities were greatly reduced. This loss of power was noticed by the Mid-East Allied Forces, a coalition of territories against the Marleyan nation, and thus war was declared in the year 850.
After four years of war, the Allies made a final stand at Fort Slava.
When the outer defenses of the Fort were destroyed, a Marleyan airship appeared and dropped Eldian victims in parachutes over the battlefield for having Zeke Yeager to transform them into Titans with the power of the Beast Titan. With around 30 anti-Titan cannons still operating, Reiner Braun joined in the ground assault and attacked the remaining defenses with the power of the Armored Titan.