The existence of barter or trade among the different tribes, and among individuals of the same or different tribes, as a means of obtaining slaves has been already noted. Hence it follows that slaves, along with wampum, furs, etc., served as a medium of exchange in trade. Furthermore, they served as gifts or objects of barter whereby captives belonging to the possessor’s tribe might be obtained, and by which an unfriendly tribe or individual might be placated. They were given to the whites to win their favor and friendship.[73] This use of slaves to purchase peace with a stronger tribe was noted by Tonti in the case of the Illinois and Iroquois. The Illinois were too weak to cope with the Iroquois on a certain occasion owing to their young men being away at war, and so by the gift of beaver skins and slaves they were able to arrange a peace.[74] Dubuisson, the French commander in the war of 1712 between the French and allied Indians, and the Ottogami and Mascouten, records a similar use made of their slaves by the Indian allies of the French as a means of appeasing the Potawatami for an old quarrel.[75] From the area about Green Bay in the present State of Wisconsin, De Lignery wrote in 1724 of bringing the warring tribes to an amicable settlement through an interchange of slaves.[76] Other French commanders in the same section used the same means to regain peace. Not only to each other, but to whites as well, were slaves given in order to make reparation for losses in war. In 1684, the Indians offered Du Luth slaves to take the place of some assassinated Frenchmen.[77] In 1724, the Indians at Detroit offered the French commander, by way of truce, two slaves for the same purpose.[78] When slaves were desired for such use, if the tribe possessed none, a raid was often made upon an enemy in order to obtain them. At the time of certain disturbances around Detroit, the Indians in the peace arrangements promised the French that they would make raids on distant nations to obtain slaves whom they would deliver to the French allies to replace their dead.[79]