What weapons did they use for the 1st time in World War 1?
The airplane, the tank, poison gas, the machine gun,
I think the machine gun pre dates WW1, but yes, it's effectiveness was a major factor in the number of men killed.
The first yperiet (mustard gas, chloride gas -1,1-thiobis(2-chloorethane)) - attack took place on April 22, 1915 in Ypres, Belgium. The gas was invented by the German chemist Fritz Haber. His wife, who didn't agree with the use of deadly gasses on the battle ground committed suicide when the first attack with yperite took place under supervision of her husband.
The first tank (British) type MARK I was introduced on the battlefield September 15 1916. 46 were used, 32 reached the frontline.
A curiosty: The first wristwatches for men, called 'trench watches' were worn by British officers in the trenches.
It was memorable for several new types of weapons technology. It was the first time planes were used as a weapons other then observation of troups. Trench warfare was introduced on a large scale. And because of trench warfare, we had the introduction, for the first time, of tanks and gas as weapons.
Trench warfare involving Machine Guns, Tanks and Chemical agents as well as Planes were the new weapons of World War One. The main problem was that neither side had much time to develop much of a strategy for their use and most of the war was a stalemate with thousands being slaughtered on either side
Why was it such a huge mistake for Civil War generals to adhere to Napoleon Bonaparte's famous military?
Basically, when Napoleon was commanding his French forces, technology in warfare was not as evolved as in the Civil War. This new technology included rifles, rifled cannons, and revolving pistols. These new weapons changed great Napoleonic tactics and victories such as Austerlitz turn into great Civil War blunders such as Pickett's Charge and the Battle of Fredericksburg. The weapons in the Napoleonic wars were smooth bores and had less accuracy and range as the rifled…