sentences:  At this time 12-pounders were the largest caliber of long-barreled field pieces, and were used both at long range against fortifications and troop concentrations using round shot and against attacking infantry and cavalry using canister shot.As such the 12-pounder was a favorite weapon of the Grande Armée.Later, redesigned 12-pounders were named after Napoleon III and found heavy use during the American Civil War.