The Nuln Mercenary Spearmen aka the Nuln Spearman.
Headquartered in Nuln and generally recruited from dropouts and flunkies of the various gunnery schools. The Nuln Spearmen ply their trade throughout the Empire. Despite their mercenary profession, they are loyal to the Imperial crown and would never take up arms against those favored by the Emperor.
Once thought of as elusive or just a legend, they are becoming common sight an the battle fields of the Empire.