Imperial Army or Imperial Troops was a name used for several centuries, especially to describe soldiers recruited for the Holy Roman Emperor during the early modern period. The Imperial Army of the Emperor should not be confused with the Army of the Holy Roman Empire, which could only be deployed with the consent of the Imperial Diet. The Imperialists effectively became a standing army of troops under the Habsburg Emperors from the House of Austria, which is why they were also increasingly described in the 18th century as "Austrians", although its troops were recruited not just from the Archduchy of Austria but from all over the Holy Roman Empire.

The Army of the Holy Roman Empire was created in 1422 and came to an end when the Holy Roman Empire was dissolved in 1806 as a result of the Napoleonic Wars.