That group is from San Pasqual Battle field State Park. They have a nice bronze reproduction mtn howitzer on a pack carriage representing those brought to California in 1847 by Stephen Kearny and his dragons in the Mexican War. They were trained by the national park service about ten years ago. That explains some of their problems, some of which weren't shown. They had been under the direction of LeRoy Ross who may no longer be with us. LeRoy was a good man who provided me with some important information on a search for a missing Sutter's Fort cannon. Thanks to LeRoy and some others I found the missing Spanish cannon. I have attended several events where they fired their gun usually without a misfire. They have other problems, too. However, they are good people who, unfortunately, received NPS training. For those who may take exception to my NPS comments, keep in mind that for "safety reasons" the NPS requires 10 minutes between shots on a cannon.