Shay's Rebellion showed the weaknesses of the Articles of Confederation. When the central government couldn't put down the rebellion, the first stirrings of federalism began to gather strength. ... The government gave most powers to the states, and the central government consisted only of a legislature.
it is said the allies won WW1 by staying in a stalemate of trench warfare. and holding the axis powers at bay, till the u.s came with fresh soldiers and so it made an impact.