History:
Wild ponies have inhabited Assateague Island for hundreds of years. Some have suggested that the wild ponies of Assateague trace their origin to horses released to forage on the Island by early settlers. However, the evidence strongly sugests that they are the descendants of the survivors of a Spanish galleon which wrecked off the coast of Assateague. This story, which has been passed from generation to generation on Chincoteague Island, is stronger than fiction.
If you've ever seen a shipwreck map of the mid Atlantic coastline, then you know that there were a remarkable number of shipwrecks. Before modern navigation, ships used lighthouses and the stars to navigate at night. This worked well until a bad storm came up or heavy fog set in, which impaired visibility. This caused ships to get off course and hit sandbars along the coast. This would usually occur during a storm and the large waves would beat the wooden ship apart. The large number of shipwrecks, together with the fact that it was very common for ships to be transporting ponies to the Colonies or South America, makes it very likely that ponies originally got to Assateague from a shipwreck.