Complex sentence: A constant state of conflict continued with Spanish and Indian forces during this time, however did not grow beyond the level of occasional skirmishes until the onset of the War of Jenkins' Ear in October 1739.
Split into simpler sentences: A constant state of conflict continued with Spanish and Indian forces during this time. However, it did not grow beyond the level of occasional skirmishes until the onset of the War of Jenkins' Ear in October 1739.