What country did not fight with the allied powers in world war 1

The countries that officially declared their neutrality in relation to the First World War were: Afghanistan - The country received a German diplomatic mission trying to convince it to act against the British in India, its border neighbors. Argentina.

The declaration of neutrality did not mean total isolation from the war. At a different time, several of the officially neutral nations cooperated with either side or both, allowing the use of their resources or territory in the war effort.