I greatly enjoyed this article! It is a description of a reenactment of Civil War battles where they actually use horses to pull artillery (which is appropriate for the time period) rather than using trucks. It also describes a Standardbred rescue, because Standardbreds fit the details that are known about the horses that pulled artillery on the battlefield. This facility uses retired Standardbred trotters that are retrained. Not all horses adjust to the sound of bombing & gunfire & they seek new homes for those that just aren’t suited to a military lifestyle.
https://www.warhorse.org/ – site of the California Historical Artillery Society
They are “one of only a handful of units in the world to portray how light artillery historically operated.” (CHAS, https://www.warhorse.org/, viewed 08/07/2018)