Massacre at Katze Plains

Massacre at Kazte Plains was an event that took place during the Annual War between the Re-Estize Kingdom and Baharuth Empire. It is also when the Ainz Ooal Gown and the Sorcerer Kingdom officially debuted themselves to the world.

Background
Prior to the massacre, the Baharuth Empire received word of a tomb that has mysterious appeared within the borders between their nation and the Re-Estize Kingdom. The Empire has sent Workers to investigate the tomb and report back what they may find but they never returned. Instead, two Dark Elves appeared at the castle, revealing themselves to be members of the Great Tomb of Nazarick. After killing many of the Empire's men including one of the Four Imperial Knights, the Elves demanded the ruler, Jircniv Rune Farlord El Nix to come visit the tomb and apologized to their king, Ainz Ooal Gown for the transgression otherwise the Empire will pay the price for refusing to comply with their nation's destruction. Jircniv and his entourage arrived at the Great Tomb where they encountered and taken aback by many of the strange denizens that lived there and the power they wielded. Ainz Ooal Gown, in particular, showed his ability to raise the dead and converted them into undead warriors with supernatural ease. In addition, he possessed a vast military force and beautiful women that will put all of the New World's to shame. The Emperor seemingly accepted this and proposed to Ainz an alliance between their nations which the latter agreed but after Jircniv left, in truth, he has already deemed the Elder Lich-like being a threat not just to his Empire but to the entire world and planned on using their alliance to leak information to the other Kingdoms and unite them against him and using various schemes to undermine him. Unbeknownst to him, one of Ainz's men already deduced Jircniv's treachery and informed this to his king.

At the Re-Estize Kingdom, King Ramposa III and his court were informed about Ainz Ooal Gown's existence and his participation to the Annual Wars as an ally to the Baharuth Empire. Terms had been made that should the kingdom surrendered, they must offer E-Rantel to Gown. Despite Gazef Stronoff's warning them about the dangers of the magic caster, both the Noble and Royalist factions dismissed him with only the king and Marchioness Raeven accepting what the Chief Warrior has told them. Nonetheless, the kingdom refused to lose part of their land and decided to continue the war by conscripting many of their male citizens to counter Ainz Ooal Gown.

Following this, Gazef met up with Brain Unglaus and Climb. Gazef asked what the two had been doing throughout the day. Brain and Climb explained that they traveled to E-Rantel in hopes to meet Momon and discuss about the two vampires he was hunting. Unfortunately, he wasn't there as he was taking on a high-rank request much to Gazef's disappointment who thought that the Raven Black Hero can be of help to repel the Empire and Ainz Ooal Gown. During their conversation, Climb informed them that he will be wearing his usual armor despite the obvious disadvantages it presented under orders of his mistress, Princess Renner who was secretly working with Ainz to spare the young knight from harm. Gazef gave the same advice he said to the court about Ainz Ooal Gown to his comrades and the two will made sure to prepare themselves whatever would threw at them by the man who saved Gazef's life. Gazef then mused to them that should all three of them survived, they should have drinks.

Meanwhile, King Ramposa had sent his son, Barbro to head to Carne Village. The reason for this is to gather information about Ainz so that the Re-Estize Kingdom can offer a peaceful resolution to the man and Ramposa secretly wanting to spare his son from death. This action proved fatal as Barbro disobeyed his father and had the village be attacked by his men so that he could use the people as hostages to have Ainz surrender. The people of Carne Village are understandably angered at this and chose to fight on behalf of the magic caster who was their savior, summoning the Goblin Army that wiped out many of their enemies. Barbro and his men retreated in terror. Later that night, Lupusregina Beta visited Barbro who begged to be spared but this is met with deaf ears as the Battle Maid explained that her king has deemed the First Prince useless to his plans and must be punished for his actions. Goblins slaughtered what was left of Barbro's army and the prince died thirty minutes after Lupusregina tortured him.

At the Imperial Castrum, Nimble Arc Dale Anoch and the Imperial Knights awaited for Ainz Ooal Gown's arrival, under secret orders by Emperor Jircniv to spy on the magic caster and determine his power. Piecing together what he had seen, the Emperor believed that Ainz Ooal Gown can at least kill a thousand men and using that theory, he decided the best course of action is to request Ainz to use his strongest spell and show the world the threat that he posed. After that, Nimble and the Imperial Knights will push away what remained of Re-Estize's army. Ainz Ooal Gown finally arrived along with his escort, Mare Bello Fiore. Ainz was also eager to follow Jircniv's suggestion. His main goal was to learn the existence of other Players like him and hopefully, one might be his comrades. He will revealed himself out in the open all while performing the spell. This tactic is to draw out anyone who recognized the spell and deploy the right countermeasures to prevent it. That will confirm Ainz's questions. After greeting his allies, Ainz ordered his army to come and much to the Imperials' shock, the army was comprised of Death Knights and Soul Eaters, monsters in legends that have wiped out entire countries.

Battle
The Annual Wars has begun. The Re-Estize Kingdom arrived on the battlefield, bringing in their Royal Army comprised of 245,000 soldiers. On the side of the Baharuth Empire, they had brought six legions of the Imperial Army to confront the opposing side. The only one who has yet to appear was Ainz Ooal Gown.

Returning to the Re-Estize Kingdom, King Ramposa III was conversing with the nobles who believed that with their sheer numbers, they have a significant advantage over the Empire and will obtain victory. This mindset also extended to the commanders such as Marquis Boullope who commanded the left wing of the Royal Army. While glad that morale is high, the king isn't fully confident about the situation.

At the front, Gazef met up with Marquis Raeven. Raeven noticed that Gazef was wearing the Four National Treasure of the Re-estize Kingdom.