Answer:
The role the foreign nations played (Britain and Spain) was that they sided with the Native Americans even though the Americans signed a treaty with them to avoid fighting, fighting still broke out between the two groups.
Step-by-step explanation:
Washington worried about ongoing European interest in the Northwest Territory. The British and Spanish were trying to stir up Native American anger against American settlers in the region. To block these efforts, Washington signed treaties with Native American groups. Yet American settlers ignored the treaties and moved onto lands promised to Native Americans. Fighting broke out between the two groups.