Invasion of Bosnia (Premysloides Dynasty)

Background
Fall of Serbia and decisive victory of False Emperor forces stand invaders in to dispute about further moves. Emperor Manuel wanted to move directly to south Serbia, Macedonia and to Constantinople, while general Valle and masters of Teutonic Order and Hospitallers wanted first to attack Bosnia, as in Bosnia was bastion of Order of Templars, their enemy and loyal ally of Roman Empire. After few hours, False Emperor accepted their request on condition that they will themself led invasion and if they will not be able to conquer Bosnia in one month, invasion will be stopped. Masters and general Valle agreed on terms.

Invasion
At early, False Emperor forces had advantage in support of local Serbs who had knowledge about Bosnian terraine and helped as scouts and suppliers. Soon, however, invading army was distress in confusion, as in Bosnia was more then one important city and bastion. Aside of province capital city Banja Luka, Bosnia had important cities and towns like Mostar, which was rich merchant crossroad, industrialized city Prijedor (center of brickworks, mining and blast furnaces), Sarajevo (large farm estates), Travnik (military outpost) and Zupanjac (fishing). This diversity of richness was achieved under rule of long-term Bosnian governor Radana Argyros, so fall of one city will not be catastrophe and invaders did not have enough supplies and troops to attack all cities, or besiege them.

Commanders decided to conquer Mostar, as important merchant crossroad with own banking house. Defenders decided to execute various defense elements and measures. They infiltrated invading army by Bosnian Serbs, who were loyal to Emperor Romanos and governor Argyros, started guerilla warfare tactic, ambushed various columns of enemies, killed nobles and commanding officers, destroyed bridges and roads through mountainous areas and luring enemy in to Mostar itself.

In Mostar, defenders transfered all gold and silver from banking house to rear and enstrenghted city citadel and fortification of city center, while evacuated other districts of city. After two weeks of chaotic and futile clashes and skirmishes in Mostar and many failed attempts to breach citadel fortification, general Valle ordered plunder town districs and retreat from Bosnia.

Aftermath
Invasion of Bosnia is considered by historians as indecisive event. Roman loyalists were able to repel attacks and maintain Bosnia province with small casualties, while invaders loot gold and silver from town districts and properties of evacuated people and was able to prevent Bosnian Roman garrison to help Roman Army in late fighting. Loot of gold and silver also enabled False Emperor to increase payments for his mercenaries.