Altdorf Company of Honour

The Altdorf Company of Honour, also known as the Sons of the Reik, are a Riekland regiment of highly-trained and highly-equipped troops dedicated to the service of the Emperor and the city of Altdorf. This highly distinquished regiment recruits exclusively from other Altdorf regiments, picking only the best and bravest men out of the many units that garrision the city in order to keep up their reputation as a crack fighting force. Other soldiers instantly recognize the regiment thanks to their distinctive appearance of yellow plumes and black steel armour, as well as being a crack-fighting force, with their battlefield history soaked in tales of glory and victory. Traditionally led by the youngest son of one of the city's noble houses, the current captain of this regiment is Otto Helstein, a valiant warrior eager to make his mark upon this world. Every Altdorf native knowns the distinctive trumpet blast that annouces when the regiment leaves the city gates for a distant campaign, and all offer praises to Sigmar to ensure the safe return of Altdorf's most favoured sons.

Source

 * Warhammer: Uniforms and Heraldry of the Empire pg 13