Jesuit Priests were a common sight in early America, bringing the word of God to the indigenous tribal people. Now Warlord will allow you to represent these men of God from the days of the French-Indian War.
Now it is hard to say that these would be any use in game terms. As a rule I doubt Jesuit Missionaries did too much fighting, but then I studied English rather than History.
However, they are certainly a characterful addition to the Black Powder range, which will allow you enhance dioramas and civilian life on the table top.
What use would you find for Warlord’s priests?