What did wilson do yo further the goal of world peace although the u. s did not join the league of nations?

President Woodrow Wilson attended the peace talks of 1919 at Versailles in France with the expectation that his grand plan for worldwide social justice, contained in his "Fourteen Points", would be readily accepted by the other leaders of the victorious powers, Britain, France, Italy, Japan et al. Instead he encountered their fervent desire to exact revenge on Germany for having begun the war (which it actually hadn't) and by making them accept that responsibility extract reparations from them.

Due to ill health (Wilson may already have been experiencing micro-strokes which affected his judgement) he eventually abandoned his grand peace plan and agreed with the much harsher peace terms imposed on Germany, which inevitably led to the rise of the National Socialist party (the Nazi's) and World War Two, which was faught to undo the terms of 1919.

In that sense his contribution to world peace was an abject failure, resulting in circumstances that would eventually plunge the world into another even more devastating war two decades later.

Explanation:

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".