who fought against whom in world war 1
World War I The conflict initially involved two opposing coalitions: France, Russia and Britain, in the Triple Entente, against the Dual Alliance of Germany and Austria-Hungary. These two had combined with Italy in the 1882 Triple Alliance but as it was primarily defensive in nature, Italy was able to remain neutral in 1914. In reality, many of the terms were informal or secret and sometimes contradicted by other agreements; shortly after renewing the Triple Alliance in 1902, Italy secretly agreed with France to remain neutral if it was attacked by Germany.[11] The coalitions expanded as the war widened: the Entente added Italy, Japan and the United States to form the Allied Powers, while the Ottoman Empire and Bulgaria joined Germany and Austria as the Central Powers.