American military technology during World War II US cruisers and battleships had their guns directed using information gathered from the ship's radar. American military technology during World War II American military technologies developed during World War II became more advanced and specialized as the war progressed. The technologies produced ranged in complexity from relatively simple items such as small arms and armored vehicles, including tanks, to more complex items such as the atomic bomb. The latter, produced under the secretive Manhattan Project, proved to be an incredibly powerful weapon that revolutionized warfare and was used to end the war. Other technologies, such as the M4 Sherman tank,
Opposition to the War of 1812 in Britain of 1812, Parliament had seen the toll the orders took on the economy and decided to suspend them. Much of the opposition to the War of 1812 came from general opposition to war in Britain during the time. Britain had been at war with France since 1793, with only a brief peace in 1802, and the Napoleonic Wars seemed to have no end. By 1812, defense spending, as a percentage of GDP, was almost 25%. The effects of war hit the British public as well. The nation had become the most militarized in the world, with 20% of all males