Of the members of the Triple Alliance and Triple Entente, which country did not honor its alliance obligations in 1914?

Question

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Italy did not honor its alliance obligations in 1914. Initially part of the Triple Alliance with Germany and Austria-Hungary, Italy declared its neutrality at the start of World War I, arguing that the alliance was defensive and that Austria-Hungary's declaration of war was aggressive. Italy later joined the Entente Powers in 1915 after being promised territorial gains.

Of the Members of the Triple Alliance and Triple Entente