Gerrha campaign

The Gerrha Campaign was a military expedition which established Seleukid control over the whole coast of the Persian Gulf.

Course of the campaign
The Gerrha campaign was characterised by the difficulty of desert warfare against highly mobile forces. The Gerrha and Maka focused on raiding the Seleukid supply lines and coastal territories, especially Rudiana. Rarely did they offer battle. By the autumn of 298 BC more and more forces had been withdraw to support Seleukos's invasion of Syria, resulting in a precarious peace with the remaining Seleukid forces rarely venturing out of their garrisons, but resistance continuing.

Guerilla warfare
With most of the Seleukid forces withdrawn to Syria, the Gerrha continued a low intensity insurgency against the Seleukids. In the spring of 298 BC they raided the granaries of the region to deprive Seleukid sources from supplies, while in a more audicious atttack they raided the city of Alexandreia Sousiane in Mesopotamia. By 291 BC tensions started rising in the province and the Seleukid garrison had to be reinforced.