While most Great Houses know that training and investing in armed forces is foolhardy as it attracts unwanted attention and most likely it will never be able to out-compete the famous The Sardaukar.
Nevertheless, the Draco family has a long history of warfare and is responsible for training a special forces regiment, called the White Serpents. These troops are specialized in both small scale conflicts and large scale warfare.
The last century wasn't kind on the Draco family, as their soldiers heavily declined in quality and numbers, as funds and resources became an increasing issue. Due to these circumstances, they lost their position at the Landsraad.
Things started to turn, as Marcus Draco, a sword master of Ginaz School, modernized and improved the fighting style of the White Dragons, making them viable again in the Imperium.
Learning from the mistakes of his predecessors, Marcus took charge of the planet.