"You really think you've got the forces for that?"
"Do I have the necessary forces? You fool! The guards for this event are more numerous than those you see here. There are two entire fleets stationed over a surrounding area of tens of kilometres, not to mention elite troops numbering over three thousand. You may be powerful, but even you cannot..."
"Like I said. Are you seriously telling me you think that's gonna be enough?"
― Jack Rakan and The Chancellor (Negima)
"Soldiers, Armies, Zhao, Qin...You are all insignificant."
― Hou Ken to the Kyou Army (Kingdom)
"Once the boy had sneaked into the pirates' hideout, right then and there, he killed all 500 of the kingdom's soldiers who were taken hostage."
― Vice Admiral Doberman on Rob Lucci (One Piece)
"Alone against all these droids...heh, they don't stand a chance."
Dale (For My Daughter, I Might Even Be Able to Defeat the Demon King)
Issei Hyoudou (Highschool DxD Ex)
Various Characters (Kingdom)
Roland (Madan no Ou to Vanadis)
The Third Raikage (Naruto)
Minato Namikaze (Naruto)
Naruto Uzamaki (Naruto)
Sasuke Uchiha (Naruto)
Madara Uchiha (Naruto)
Hashirama Senju (Naruto)
Various Characters (One Piece)
Ainz Ooal Gown (Overlord)
Azi Dahaka (Problem Children Are Coming from Another World, Aren't They?)
Alcides/Heracles (Record of Ragnarok)
Moroha Haimura (Seiken Tsukai no World Break); in his past life as Kensei Flaga
Sung Jin-Woo (Solo Leveling)
Kirito (Sword Art Online); Alicization arc only
Jin Toujou (Testament of Sister New Devil)
Emperor Calus (Destiny)
Lost Force/Restrictors (Dirge of Cerberus: Final Fantasy VII)
Kratos (God of War series)
Zeus (God of War series)
Chin (Hong Kong 97)
Sora (Kingdom Hearts series)
Tailon (Middle Earth series)
Alex Mercer (Prototype series)
James Heller (Prototype series)
Nightmare (Soul series)
Starkiller (Star Wars:Force Unleashed series)
Cu Chulainn (Valkyrie Crusade)
Doom Slayer (Doom)
Achilles (Greek Mythology)
Cu Chulainn (Irish Mythology)
Arjuna (Mahabharata/Hindu Mythology)
Bhishma (Mahabharata/Hindu Mythology)
Drona (Mahabharata/Hindu Mythology)
Karna (Mahabharata/Hindu Mythology)
Krishna and most warriors (Mahabharata/Hindu Mythology)
Parashurama (Mahabharata/Hindu Mythology)
Various Characters (Star Wars)
Hel (Thor: Ragnarok)
Ergo Mundus (Anima: Beyond Fantasy)
Bantenin (Houshin Engi)
Devil King's Long Sword (Solo Leveling)
Anti-Army Noble Phantasms (TYPE-MOON)
Ergo Mundus (Anima: Beyond Fantasy) annihilated both the city of Magna and the Church's armies with minor effort and could have potentially destroyed the armies of the Empire of Abel.
Asterix & Obelix (The Adventures of Asterix)
Before becoming the Black Swordsman, Guts (Berserk) became infamous for slaying over 100 Tudor Mercenaries during his days as the raider captain of the Band of Hawk which earned him the nickname of Hundred Man Slayer.
After 300 years of endless combat, it's just another day for Zodd the Immortal (Berserk).
Emperor Calus (Destiny) with his Imperial Nova attack is capable of annihilating all his enemies at once.
Oryx (Destiny) can eliminate all of the Guardians with his powerful move "Doxology".
Belphemon X (Digimon), the evolved version of the Demon Lord of Sloth, has so much power it can utterly decimate even the strongest armies by itself.
The Doom Slayer (Doom) can single-handedly lay waste to the entire Legions of Hell.
In his youth, Son Goku (Dragon Ball) personally destroyed the entire Red Ribbon Army.
In his mastered Golden Form, Frieza (Dragon Ball Super) single-handedly massacred an entire army of assassins within a few minutes. Even one that was empowered by a God of Destruction.
As a Great General and a powerful martial warrior, Ou Ki, The Monstrous Bird of Qin (Kingdom) could decimate entire battalions of enemy infantry and cavalry with ease.
In his first appearance, Hou Ken, the Bushin (Kingdom) easily destroyed a Great General's highly trained army.
A Great General of the highest caliber, Ren Pa (Kingdom) can easily destroy entire units of enemy soldiers.
As the strongest Shiyuu swordswoman alive, Kyou Kai (Kingdom) can easily destroy entire armies of soldiers.
Zen Ou (Kingdom)
Madara Uchiha (Naruto)…
…takes on the entire 4th army of the Allied Forces during the Great Fourth Shinobi War…
…and completely overwhelms them.
During the final days of the Third Great Shinobi War, Minato Namikaze (Naruto) became famous for killing over 100 shinobi earning the title, the Yellow Flash.
During the final day of his "retirement", Kuro (One Piece) slaughtered an entire ship full of trained Marines with his immense speed.
A genius Six Powers/Rokushiki master, Rob Lucci (One Piece) personally killed over 500 soldiers and an entire crew of pirates by himself at the young age of 13.
Donquixote Doflamingo (One Piece)
A powerful master swordswoman, Charlotte Amande of the Big Mom Pirates (One Piece) is…
…capable of massacring an entire army of armored knights single-handedly.
Alcides (Record of Ragnarok) decimated the entire vanguard of the gods and stood against the god of war itself, Ares.
Starkiller (Star Wars: Force Unleashed series) is a powerful force user, capable of disintegrating groups of stormtroopers with a single blast.