This is because it was when the Allies were able to defeat the Axis powers, which gave hope to the Allies to fight stronger. Also, when they defeated Axis powers at that battle, they(ALLIES), now had vantage points on both sides of Germany; east(UK) and west (Russia).
The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. ... This assassination led to Austria-Hungary declaring war on Serbia.
It was constantly attacked by foreign countries and this made it get weaker
The order is
1. Federal
2. State
3. Local
