Frace declared was on Germany immediately after Germany declared was on Russia.
If it were true that France had a formal military alliance with a country that was already engaged in conflict with Germany, this would suggest that the alliance was a significant factor in France's decision to enter the war. Additionally, if there were evidence showing that France felt compelled to support its ally due to treaty obligations or fear of losing international credibility, this would further indicate that the alliance played a crucial role. Lastly, if France's military preparations and mobilizations were directly linked to the actions of its ally against Germany, this would also point to the alliance as a driving cause for France's involvement.
Quadraple Alliance
Italy
Germany didn't 'enter' the Triple Alliance: it created it in 1879-82. The main reasons were fear of Russia and, to a much lesser extent, France.
Japan joined Germany & Italy in a military alliance called the "Tripartite" or "Axis" powers on September 27, 1940.
Germany sent the telegram to Mexico in 1917 in an attempt to form an alliance and distract the United States from entering World War I.
World War 1
The Zimmerman Telegram.
Warsaw Pact
The Triple Alliance was a military alliance formed in 1882 between Germany, Austria-Hungary, and Italy. It was primarily aimed at countering the threat posed by France and Russia in Europe. The alliance played a role in World War I as Germany and Austria-Hungary were central powers fighting against the Triple Entente (France, Britain, and Russia).
Germany attempting to form a military alliance with Mexico.