John J Pershing leads the first American troops to France in June 1917.

The French army grapples with widespread unrest after the Nivelle Offensive

April was a deadly month for the Royal Flying Corps.

Dicta Boelcke

1. Try to secure advantages before attacking. If possible, keep the sun behind you.

2. Always carry through an attack when you have started it.

8. For the Staffel (squadron): Attack on principle in groups of four or six. When the fight breaks up into a series of single combats, take care that several do not go for the same opponent

Robert Nivelle's magic solution to the deadlock leaves the French army on the brink of mutiny.

The British launch a successful set piece on the eve of the Nivelle Offensive.

When your people protest, it's best not to ignore them.

It took the United States 65 days to go from committed neutral to full blown participant.

By the end of 1916, neutrality had left the United States in a precarious spot.

Life Magazine, February 1916.

Germany's decision to unleash the torpedoes would have adverse consequences

For the second time in the war, Germany turns to unrestricted submarine warfare.