Shay's Rebellion was a revolt in Springfield, Massachusetts where armed rebels led an uprising against the government officials who would come to collect taxes. The people in Springfield felt very far from the government in Washington D.C. which they essentially were far from. This pushed for changing the Articles of Confederation, because it took a long time to quell the rebellion and there was a general recognition for the need of a stronger, more centralized government, so that this type of scenario would never happen again.
The Schlieffen Plan was conceived by German general General Alfred von Schlieffen and involved a surprise attack on France. The plan failed because it wasn’t realistic. It would have required a flawless unfolding of events which never occurs in wartime
