Sergeant McKnight is an Emmerian Tank commander. His tank crew consists of himself and two other Sergeants, Torch and Hobsbawm. They deserted to break into Gracemeria Central Bank. After missing their mark, they find the Golden King and many other treasures, along with a Matilda, group of children she was with and Lieutenant Colonel Voychek that were abandoned in the invasion.
Sources
http://acecombat.wikia.com/wiki/Ace_Combat_6
Names from Pilots of Ace Combat 6
picture fromMcKnight Reasurres Torch and Hobsbawm