There were a number of different medicines developed such as Atabrine to treat malaria ~ see related link below .
They had not fully developed nuclear bombs.
Napalm
True
the first ever mass produced tank was developed and used near the end of WW1
Sonar was not introduced in World War 1.
medincende
During world world war I
During World War I.
Airplane's
Nuclear weapons
Nuclear weapons
Nuclear weapons
increased military casualties in battles fought during the war
Tanks (armored cars) were used for the first time at the Battle of the Somme during World War 1. More modern tanks were developed just before the end of the war. Anti-aircraft guns, sub-machine guns, and automatic rifles that could be used by one man, were developed during World War 1. The hand grenade was in existence but was quickly developed for use during WW1. Poison gases such as chlorine gas and mustard gas were first used in World War 1 although they had already been developed.
Atomic bombs
Atomic bombs
Atomic bombs