The notable armed forces of Waterdeep are listed in this article.

Griffon Cavalry 
Elite airbourne division of the City Guard, led by Lord Moedt.
City Guard 
Waterdeep's army, patrolling the city and the surrounding countryside.
City Navy 
The force assigned to protect the seas around the city and the busy merchant shipping lanes.
City Watch 
The police force of the city, with powers of arrest over its citizens.
Gray Hands 
An elite force of adventurers answering directly to the Lords of Waterdeep, for those who need a more powerful option.