July Crisis:
*Austria-Hungary's declaration of war on Serbia on July 28, 1914, set in motion a chain of diplomatic and military maneuvers involving Russia, Germany, France, and Britain known as the July Crisis.
- Austria-Hungary's mobilization against Serbia prompted Russia to order general mobilization on July 30.
- As a response to Russia's actions, Germany declared war on Russia on August 1 and later on France on August 3.
It is important to note that the mobilization plans of various European countries were well-established before the July Crisis, and while Russia's mobilization was a significant factor in escalating tensions, it was not the sole or decisive cause of World War I.