Some of the new generation Holy Knights

 

Name: Holy Knights
Origin: Nanatsu no Taizai
Classification: Generally all humans, some fairies and demons at times, though
Age: 3000+
Population: Unknown, estimated in the tens of thousands or even hundreds of thousands
Leader(s): King Baltra Liones, Arthur Pendragon
Center of Operations: Britannia (Liones, Danafor, Edinburgh and Camelot) 
Technology/Abilities: Magic (Holy Knights posses all kinds of abilities such as elemental manipulation, teleportation, the ability to create explosions, mind control, energy blasts, energy projection, forcefields, healing, gravity manipulation, illusion creation, barriers, ect), weapon mastery (Holy Knights use all kinds of weapons such as swords like katana, claymores, broadswords, rapiers, spears/halberds, axes, bows), your typical kingdom offensive and defense equipment such as catapults, ballistas, battering rams, large armies of fodder, they have several high-class mages that are capable of producing technologically advanced magical tools such as the Balor's eye (see Dragon Ball's scouter), magical orbs that heal, teleport the user or cast magic barriers (Merlin is one of the most technologically advanced minds in Nanatsu no Taizai and is responsible for these item's creation in the first place), they have access to Red and Gray demon DNA which are typically used to enhance some of their apprentices physical attributes, a fair amount of Holy Knights are intelligent inside and out of combat and can competently lead small and or large armies of soldiers into battle, the Druids which are allies to the Holy Knights are capable of blessing their melee weapons (said blessings make their weapons more effective against malevolent beings)
Weaknesses: None notable
Holdings: The Holy Knights rule over the country of Britannia and hold several different areas such as the Kingdom of Liones, the Kingdom of Danafor, the Kingdom of Edinburgh, and the Kingdom of Camelot, they've also had affiliation with The Fairy King's Forest, Seven Deadly Sin's, Giant Clan, The Goddess Clan and The Druids
Notable Individuals: 

Kings:
King Baltra Liones (King of Liones)
King Arthur Pendragon (King of Camelot)

Great Holy Knights:
Dreyfus
Hendricksen
Zaratras

Holy Knights:
Cain
Doni
Gannon
Gilthunder
Griamore
Gustaf
Hauser
Helbram
Kaide
Liz
Marmas
Meliodas (former)
Vivian

Holy Knight Apprentices:
Andre
Twigo

(The following below are sub-factions of Holy Knight and Holy Knight Apprentices.)

Recators:
Dale
Geera
Jericho
Muramo

Weird Fangs:
Friesa
Golguis
Jude
Ruin

Dawn Roar:
Hugo
Jillian
Simon
Threader
Weinheidt

Six Stars of the Azure Sky:
Arden
Death Pierce
Deldry
Denzel Liones
Dogget
Wayeo

Notable OBD Victories:
Notable OBD Losses:
Other: