The United Kingdom officially declares war on the Empire of Japan.

British India declares war on the Empire of Japan.

On December 9, 1941, Cuba declared war on the Empire of Japan.

Asquith and the Cabinet had the King declare war on the German Empire on 4 August 1914.

Britain declared war on the German Empire on 4 August 1914.

When Russia declared war on the German Empire in 1914, his father - a fervent Russian monarchist - decided to russify the family name.

After declaring war on the German Empire, the Russian Empire had been able to mobilize very quickly.

On 28 August 1916, Italy declared war on the German Empire.

Christian IV of Denmark had declared war on the Holy Roman Empire in 1625.

On April 2, 1917, Wilson asked a special joint session of Congress to declare war on the German Empire.