Do you mean, what invention utilised during the Civil War changed combat? The rifle-barrelled cannon. Or the minie-ball. The post-war invention would have been the machine-gun.
Before the explosive devices were invented, fighting completely required strength (for example using swords, arrows etc.) and never relied much on heat to kill the enemy. The invention of the explosive devices changed this.
The machine gun changed warfare
sucking balls
ANSWER The building of the Ironclads.
Gunpowder
Aerial vehicles
Iron Bridge
gunpowder and the abacus.
Do you mean, what invention utilised during the Civil War changed combat? The rifle-barrelled cannon. Or the minie-ball. The post-war invention would have been the machine-gun.
Before the explosive devices were invented, fighting completely required strength (for example using swords, arrows etc.) and never relied much on heat to kill the enemy. The invention of the explosive devices changed this.
The Chinese were the first to use paper as an invention.
Gunpowder - Tseng Kung-Liang made the formula publicly available in AD 1040.
Gunpowder: once used in warfare, it made it's way along the silk road to India, the Middle East and Europe.
If it is a particular Chinese invention, then most likely paper.
The machine gun changed warfare
Cravat