World War I is sometimes called 'The war of inventors'.
Let's analyze the abovementioned list of technological developments to see which of them were present in WWI (World War I):
- Trench warfare
, was actually one of the main features of WWI. It was the most spread form of fight in the Western Front. It was linked to the development of firepower but without improving mobility so it supposed a great effort to dominate a very small portion of territory.
- Poison gas
was employed as a weapon in WWI. For example, tear gas or mustard gas were employed.
- Computers
were developed from the analog mechanical calculators used in WWI to set the target of artillery guns, but the use electrical computers was not generalized until WWII.
- Submarines were used in WWI to defend the coasts, against warships and also merchant ships as a way to cut supplies.
- Radars were not extensively developed until the 1930s hence these were not part of the inventions applied in WWI.
- Machine guns derived from the Maxim model were used in both sides during WWI.
