Pierre Le Moyne Iberville, sieur d', a Canadian naval and military commander, founder of Louisiana, born in Montreal, July 16, 1661, died in Havana, July 9, 1706. He was one of eleven brothers, most of whom were distinguished in French colonial affairs, three being killed in the service. (See Le Moyne.) Iberville entered the French navy as a midshipman at 14, became captain of a frigate in 1692, and captain of a line-of-battle ship in 1702. In 1686 he served under De Troye in the overland expedition from Canada against the English forts in Hudson bay, was at the taking of Fort Monsipi, and, having with his brother captured two vessels, reduced Fort Quitchitchonen. He was there again in 1688-'9, capturing two English vessels. In 1690 he was one of the leaders in the retaliatory expedition against Schenectady, where he saved the life of John Sanders Glen. In October, 1694, he took Fort Nelson on Hudson bay, losing his brother Chateauguay in the assault. In May, 1696, he was operating on the bay of Fundy with three vessels; he defeated three English ships, capturing the Newport near the mouth of the St. John's, then besieged, took, and demolished Fort Pemaquid, and ravaged Newfoundland, taking almost all the English posts.

Proceeding to Hudson bay in 1697, with the Pelican he engaged three English vessels, defeated them, and reduced Fort Bourbon. He was then selected to occupy the mouth of the Mississippi, a point which France had neglected after the death of La Salle. Iberville sailed from Brest with two frigates, Oct. 24,1698, stopped at Santo Domingo and at Pensacola, which he found occupied by the Spaniards, and on Jan. 31, 1699, anchored at the mouth of the Mobile near Massacre island. He then, with his brother Bienville, Pere Anastase Douay, who had been with La Salle on his last voyage, and about 50 men, went in two barges to seek the Mississippi, and on March 2 reached its mouth. He ascended to the Bayagoulas and Oumas, and became assured that he was really on the Mississippi by receiving from the Indians a letter left by Tonty in 1686 for La Salle. Returning to his ships, Iberville built old Fort Biloxi, the first post on the Mississippi, placed Sauvolle in command, and made his brother Bienville king's lieutenant.

Early in May, 1699, he sailed for France, but again appeared off Biloxi in the Renommee, Jan. 5, 1700. He then began a new fort on the Mississippi, over which he placed Bienville. He also sent Lesueur with a party to establish a post at the copper mines on the Mankato. He was again in Louisiana in December, 1701, and finding the colony reduced by disease he transferred the settlement to Mobile, beginning the colonization of Alabama. He also occupied Dauphin or Massacre island. His health was seriously undermined by fevers, and he was called away from his Louisiana projects by government. In 1706, with three vessels, he reduced the island of Nevis, and was about to operate on the coast of Carolina, when he was seized with a fatal malady and died in Havana.