What happened April 1917 AD

Mao published his first article in New Youth in April 1917, instructing readers to increase their physical strength to serve the revolution. He joined the Society for the Study of Wang Fuzhi (Chuan-shan Hsüeh-she), a revolutionary group founded by Changsha literati who wished to emulate the philosopher Wang Fuzhi.

Wilson (USA presedint) called for war on Germany on 2 April 1917, which the US Congress declared 4 days later.

After the U.S. entered the First World War in April 1917, Garvey initially signed up to fight but was ruled physically unfit to do so. He later became an opponent of African-American involvement in the conflict, following Harrison in accusing it of being a "white man's war".

Protracted action at Verdun throughout 1916, combined with the bloodletting at the Somme, brought the exhausted French army to the brink of collapse. Futile attempts using frontal assault came at a high price for both the British and the French and led to the widespread French Army Mutinies, after the failure of the costly Nivelle Offensive of April–May 1917.