 Complete the following phrase:  The Excubitors took part in the disastrous Pliska campaign in 811, when the Byzantine army was routed by Tsar Krum of Bulgaria; the Domestic of the Excubitors fell in the field along with the other senior Byzantine generals, including Emperor Nikephoros I himself . The most prominent Domestic of the Excubitors of the period was Michael II the Amorian , whose supporters overthrew Emperor Leo V the Armenian  and raised him to the throne. The regiment also fought at the battles of 