Join the Brave Throng that Goes Marching Along

Of the 42 million men mobilized by the Allies, 22 million, or 52%, became casualties (dead, wounded, missing, or prisoners).

Russia - 76% casualty rate
Britain - 36% casualty rate
France - 73% casualty rate
United States - 8% casualty rate

You shall not hear their mirth:
You shall not come to think them well content
By any jest of mine. These men are worth
Your tears: You are not worth their merriment.

--Wilfred Owen, from Apologia Pro Poemate Meo, 1917

soldiers wearing various types of gas masks

Various types of gas masks in use in different armies

The War of the Nations Portfolio (New York: The New York Times Co., 1919), 154.