Weskarini, an Algonquin tribe, known as Petite Nation des Algonquins (Little Nation of the Algonquin), lived on the north side of the Ottawa River below Allumettes Island (Morrison's Island), Québec, New France. They had close associations with the Jesuit missionaries.
Most of the Weskarini Algonquin got baptized in Montréal, and the rest later at Trois-Rivières, as they separated from the rest of the Algonquin who continued up the Ottawa River. They finally settled in Trois-Rivières, setting up their village near the Fort there.
In March 1643, Jeanne Mance, a French nurse at the Hôtel-Dieu in Montréal took care of Pachirini, a wounded young Algonquin warrior. Sachem baptized as Charles on April 2, 1643, in Montréal by Father Imbert Duperon lived in Montréal for some time with the two Jesuits of the post. Most of the Weskarini Algonquin became Catholics, being baptized between 1643 and 1650 by the Jesuits in Montréal and the rest later at Trois-Rivières. They settled in Trois-Rivières, setting up their village near the Fort there. While his fellow tribesmen left for Trois-Rivières, Charles Pachirini led the Jesuits to explore the shore that was later to become Laprairie (a Jesuit mission).
Prior to 1648, Charles Pachirini rejoined his people at Trois-Rivières and became the captain of the Christian Algonquins, even during the lifetime of his discredited predecessor Paul Tessouhat II, the chief of the Kichesipirini, or Algonquins of Allumette Island. He was given a Fiefdom in Trois-Rivières.
This was a time when the Iroquois were at war with the Algonquin.
Earlier, on October 18, 1646, near the village named Ossernenon also known as Gandaouge, Gandawaga and Caughnawaga in the Iroquois Confederacy in New France (present-day Auriesville, New York) the Iroquoi Mohawks killed Saint Isaac Jogues, a Jesuit missionary and threw his body in the St. Lawrence River.
Around 1652-1653, Mohawks of Ossernenon raided the town of Trois-Rivières and the Algonquin village of Sachem Charles Pachirini.