In Histoire de Montréal, François Dollier de Casson portrays Dollard as "a youth of courage and of good family" and in the Jesuit Relations, Dollard is described as a "man of accomplishment and generalship".

Most importantly, Dollard had gained the trust of Paul de Chomedey, Sieur de Maisonneuve, who authorized Dollard’s expedition to Long Sault.

The reason for Dollard and his companions for ambushing the Iroquois is up to debate.

Tradition holds that Dollard anticipated an Iroquois attack on Ville-Marie (Montreal).

There are many scholars who claim his reasons were different.

According to André Vachon, some historians claim that Dollard was in debt and thereby sought to steal the furs from the Iroquois who were returning from their winter's hunt. One of such criticisms lies on the fact that Paul Chomedey de Maisonneuve approved of this expedition, which implied that the goals of the expedition were justified on more civil service or military grounds.

The group comprised about 17 volunteers who had little or no experience in Aboriginal warfare.

After a 10-day canoe trip up the Ottawa River, they set up camp not far from Carillon, Quebec, in a former stockade.

Traditionally, the battle was fought along the Ottawa River near Carillon, Quebec.

This location is based on nationalistic traditions on the part of Quebec historians.

The events were witnessed by about 40 Huron allies who at times had joined the colonists in the stockade and at other times had harried the Iroquois from outside.

According to some scholars, the battle so weakened the Iroquois they canceled their planned attack on Ville-Marie (Montreal) and returned home.

For over a century Dollard des Ormeaux became a heroic figure in New France, and Quebec, as he exemplified selfless personal sacrifice, as well as martyrdom for the church, and for the colony.