This was shot in 2002 at an American Civil War Re-enactment at Black Creek Pioneer village, here in Toronto.
In addition to the actual battles being fought, there were demonstrations and displays of various crafts and skills of the period.
The firing of one of the field pieces took place in a large open patch of ground and I used a motor-driven camera and wide lens to grab this shot.
motorized Nikon FA
Nikkor 24 2.8 AIS manual focus
Fuji 100 ISO colour slide
5.6 @ 1/1000th