Vojvoda Petrilo was a 11th-century Serbia

Serbia

Serbia , officially the Republic of Serbia , is a landlocked country located at the crossroads of Central and Southeast Europe, covering the southern part of the Carpathian basin and the central part of the Balkans...

n voivod (military commander) of the Serbian King Constantine Bodin.

Bodin was crowned as Emperor of Bulgaria in 1072 and was set to conquer the Byzantine territories of Bulgarian interest together with Georgi Voiteh

Georgi Voiteh

Georgi Voiteh was a 11th century Bulgarian aristocrat from Skopje and the organizer of a major uprising against the Byzantine rule. He was from a Kavkhan family....

 (anachronistically called the Uprising of Georgi Voiteh

Uprising of Georgi Voiteh

The Uprising of Georgi Voiteh was a Bulgarian uprising against the Byzantine Empire in 1072. It was the second major attempt to restore the Bulgarian Empire after the Uprising of Peter Delyan in 1040-1041....

, or Slav Uprising in Pomoravlje in Serbian

Serbian language

Serbian is a form of Serbo-Croatian, a South Slavic language, spoken by Serbs in Serbia, Bosnia and Herzegovina, Montenegro, Croatia and neighbouring countries....

).

Petrilo led a 300-strong army towards the south, into Macedonia

Macedonia (region)

Macedonia is a geographical and historical region of the Balkan peninsula in southeastern Europe. Its boundaries have changed considerably over time, but nowadays the region is considered to include parts of five Balkan countries: Greece, the Republic of Macedonia, Bulgaria, Albania, Serbia, as...

, and took Ohrid

Ohrid

Ohrid is a city on the eastern shore of Lake Ohrid in the Republic of Macedonia. It has about 42,000 inhabitants, making it the seventh largest city in the country. The city is the seat of Ohrid Municipality. Ohrid is notable for having once had 365 churches, one for each day of the year and has...

 where the townspeople greeted him as their liberator and Devol (Kavadarci

Kavadarci

Kavadarci is a town located in the Tikveš region of the Republic of Macedonia. Situated in the heart of Macedonia’s wine country, it is home to the largest winery in south-eastern Europe, named after the Tikveš plain. The town of Kavadarci is the seat of Kavadarci Municipality...

) which surrendered. He was stopped by Byzantine troops and locals at Kastoria

Kastoria

Kastoria is a city in northern Greece in the periphery of West Macedonia. It is the capital of Kastoria peripheral unit. It is situated on a promontory on the western shore of Lake Orestiada, in a valley surrounded by limestone mountains...

 led by a Byzantine general (of Bulgarian origin) that defeated him, making Petrilo return to Duklja

Duklja

Doclea or Duklja was a medieval state with hereditary lands roughly encompassing the territories of present-day southeastern Montenegro, from Kotor on the west to the river Bojana on the east and to the sources of Zeta and Morača rivers on the north....

.