.45-caliber

Theodore Roosevelt's Rough Riders at the Battle of San Juan Hill, a turning point in the Spanish-American War, as well as firearms innovation.

Strange Smokeless Powder Rounds at Santiago

They were outgunned by Spanish and their wondrous smokeless powder .45-caliber rifles. Could this rag-tag team of American Cavalry men survive–and win? “The Mauser bullets drove in sheets through the trees and the tall jungle grass, making a peculiar whirring or rustling sound; some of the bullets seemed to pop in the air, so...