 Complete the following phrase:  Some historians have dismissed the Praetorian Guard as a parade-ground army of little military value. The Praetorians were certainly taunted as such by the soldiers of the Danubian legions during the civil war of 689. But Rankov argues that the Praetorians boasted a distinguished campaign-record that shows that their training and military effectiveness was far more impressive than those of merely ceremonial troops and amply justified their elite status. During the Julio-Claudian era to 68, the Praetorians saw relatively little action in the field, as emperors only rarely led their armies in person. After that date, emperors led armies, and therefore deployed the Praetorians on campaign, much more frequently. The Praetorians were in the thick of the Emperor Domitians wars, firstly in Germany and then on the Dacian front, where their prefect, Cornelius Fuscus was killed in action 87. Other examples include the Praetorians prominent role in Trajans Dacian Wars 101-6, as acknowledged on the friezes of Trajans Column and the Adamklissi Tropaeum. Equally celebrated, on the Column of Marcus Aurelius, was the Praetorians role in the Marcomannic Wars 166-80, in which two Guard prefects lost their lives. Even their final hour was wreathed in military glory: at the 