 The two guns are model 1819 iron 24-pounder seacoast guns, and were originally part of a three-gun Confederate battery guarding Tampa Bay during the Civil War.On May 6, 1864, a Union naval raiding party captured Fort Brooke and, before withdrawing the next day, disabled the three heavy cannon by blowing one trunnion off of each (trunnions are the side projections on which cannon pivot to elevate or depress).This damage is still evident on the two Plant Park guns today.