While Pliska experienced nearly a century of growth following its selection as the capital of the new Bulgarian state, this was not a peaceful era. The Bulgars and Byzantine Empire were in an almost constant state of war during the eighth century and into the early ninth. Emperor Constantine V oversaw nine campaigns against the Bulgars between 741 and 775, and Emperor Nikephoros I's campaign in 811 resulted in the burning of the royal residence in Pliska. In this last instance the emperor led a massive army to Pliska in retaliation for the Bulgarian capture of Sardika and massacre of its garrison that occurred in an earlier set of hostilities. The Bulgarian leader Krum was not prepared to face the emperor's army and thus abandoned Pliska and the Byzantines plundered the palace and town there and burned it to the ground as it was largely at this time made of wood. Soon after, the invaders were driven out by Khan Krum (see Battle of Pliska).