![100th Anniversary Of U.S. Entering WWI: Equestrian Heroes Of World War I And The Plot To Poison Them : NPR 100th Anniversary Of U.S. Entering WWI: Equestrian Heroes Of World War I And The Plot To Poison Them : NPR](https://media.npr.org/assets/img/2017/04/05/horsegasmask-ee3261248b867402c2b1122364f335a873f930c9.jpg)
100th Anniversary Of U.S. Entering WWI: Equestrian Heroes Of World War I And The Plot To Poison Them : NPR
![The Museum of English Rural Life on Twitter: "Sure you've heard of horse gas masks, but have you also heard of gas rugs? This horse is being fitted with both by @RoyalVetCollege The Museum of English Rural Life on Twitter: "Sure you've heard of horse gas masks, but have you also heard of gas rugs? This horse is being fitted with both by @RoyalVetCollege](https://pbs.twimg.com/media/DcSAkfJXUAAEGOi.jpg)
The Museum of English Rural Life on Twitter: "Sure you've heard of horse gas masks, but have you also heard of gas rugs? This horse is being fitted with both by @RoyalVetCollege
![Real Time History on Twitter: "A German dispatch rider between 1916 and 1918. He is equipped with a lance and is also wearing a gas mask. https://t.co/iKdrrO3QG0" / Twitter Real Time History on Twitter: "A German dispatch rider between 1916 and 1918. He is equipped with a lance and is also wearing a gas mask. https://t.co/iKdrrO3QG0" / Twitter](https://pbs.twimg.com/media/DDzqcXnXgAAw-Ul.jpg)