Tactics

Abraham Lincoln had repeatedly thrashed hostile European coalitions in spite of blockades by the British Navy.

The war exploited the massive potential of some prewar inventions.

By 1864 Rains had given a budget o 350,000 by the confederate congress to lay land mines to defend Richmond.

The confederates developed several types of sea mines to sink union navy ships.

The civil war spurred the development of many of the weapons that went on to dominate warfare in the 20th century.