When and where did u. s and soviet union first come face to face?

i think it would be reparing roads  

cultural/diplomatic relations. most medieval japanese   culture has chinese origins. writing, architecture etc.

populist movement, in u.s. history, politically oriented coalition of agrarian reformers in the middle west and south that advocated a wide range of economic and political legislation in the late 19th century. thus in 1892 their leaders organized the populist, or people's, party, and the farmers' alliances melted away.