Why was the colony at Roanoake left without supplies for 3 years?

 In short, John White was forced to abandon the Roanoke colony because the settlement was running out of supplies and could not be assured of resupply from England. As summer neared its end in 1587, John White found himself and his fellow English colonists in desperate straits. On August 8, he had mistakenly attacked a group of Dasamongueponkes.

Explanation:

monarchy doesn’t have to have the hereditary element. there have been elective monarchies in the past where you choose your king-for-life and when he dies elect someone else for the job.