German South-West Africa surrenders to South African forces

The Indian Corps played a major role in the British attack on Neuve Chapelle, one of the first large offensives on the Western Front. Indian soldiers fought in conditions for which the colonial army...

Ottoman authorities arrested hundreds of Armenian intellectuals and community leaders in Constantinople, marking the opening phase of the Armenian genocide. Deportations and mass killing targeted...

British, French, Australian, and New Zealand forces landed on the Gallipoli peninsula in an attempt to force the Dardanelles. Ottoman defenders repelled the campaign after months of fighting. The...

Japan’s ultimatum forced China to accept revised terms after months of negotiations over the Twenty-One Demands. The agreement strengthened Japanese influence in China while provoking public anger and...

Britain, France, and Russia issued a joint statement describing the Ottoman violence against Armenians as crimes against humanity and civilization. The phrase entered international discourse, but...

Socialists from across Europe met at Zimmerwald to oppose the war and call for peace. The manifesto linked the conflict to imperial competition and condemned the burden placed on workers and oppressed...

Ottoman troops surrounded the British-Indian force at Kut in Mesopotamia after its retreat from Ctesiphon. The siege exposed the cost of an imperial campaign supplied and fought largely by Indian...

The Allies completed the evacuation of Gallipoli after the failed attempt to seize the Dardanelles. Ottoman defenders had repelled a campaign involving British, French, Australian, and New Zealand...

After a prolonged campaign through difficult terrain, the last German stronghold at Mora surrendered to Allied forces. African soldiers from British and French colonies were essential to the campaign....

Irish republicans launched an armed uprising in Dublin during the war. British forces suppressed it and executed many leaders, shifting public opinion and strengthening support for independence....