Historic Horseshoes: March on Pavement Impressed Military of Value of Calks for Artillery Horses

Here's the 112th Field Artillery, a New Jersey unit, in marching formation. Notice how close to the side of the road they are. In 1935, similar artillery horses from Fort Myer in Virginia were marched 300 miles on hard-surfaced roads to test out horseshoe designs.


One clue led to another, and finally I tracked down an interesting account of how--and why--the US Army selected its horseshoes