Defender of the Light

Defenders of the Light are involved in the following quest: They're Argent human paladins and soldiers. There were 250 of them defending Light's Hope Chapel and suffered heavy losses.

After the battle ceases Highlord Tirion Fordring recognizes the fallen soldiers for fighting to save the lives of their own as well as everyone else that participated in the battle.

Equipment
It seems as though the Defenders of the Light are wearing level 80 gear which is applied due to the opening of Wrath of the Lich King.