Use this poster below to answer the question
Earth Day April 22 Union Square 5th Avenue
What was what is the historic content of this poster?
A. a growing concern with vital mental issues
B. frustration with the length of the Vietnam War
C. the growth of counterculture movement
D. the increasing popularity of Richard Nixon

I think maybe C, i'll update when I'm done.

Explanation:

saint clair’s defeat, (november 4, 1791), one of the worst defeats ever suffered by u.s. forces in indian warfare, precipitated by british-indian confrontation with settlers and militia in the northwest territory following the american revolution. despite specific provisions in the treaty of 1783 for the evacuation of its forts on the northwestern border, britain had failed to yield these lucrative fur-trading posts. in hopes of reclaiming lost hunting grounds with british support, a northwest indian confederation was gradually molded between 1785 and 1787, consisting mainly of shawnee, delaware, ottawa, iroquois, ojibwa, miami, and potawatomi. kentucky frontiersmen reacted to this threat by initiating raiding parties on native villages as early as 1788, and indian warfare flared up the following year.