High Quality Content by WIKIPEDIA articles! USS Soubarissen (AO-93) was an Escambia-class fleet oiler converted to a water tanker, named for a chief of the "Neutral" Indian Nations which, although a part of the Iroquois confederation, were called "neutral" by the French because they took no part in the wars of the Iroquois and Hurons. The area he governed included the oil fields of northwestern Pennsylvania and western New York. The knowledge of the oil seepages there was well known among the Indians, and it was declared neutral ground so all Indians could obtain oil for medicinal and domestic purposes without danger or interference. In 1627, Joseph de La Roche Daillon heard of the oil springs and made an expedition to visit them. He was kindly received by Chief Soubarissen, shown the oil seepages, and duly reported his observations to his superiors. These observations contributed largely to the interest in the petroleum resources of the Pennsylvania region.