The correct answer would be based on point of view about what constitutes the beginning of WW2. From an Asian point of view, the war began in 1936 in Manchuria and was a three-way conflict between the Chinese, Russians, and Japanese. Very large numbers were killed and certainly there is no definitive first casualty.
In Europe, the war began (for some) when Germany invaded Czechoslovakia (and / or Austria). Most textbooks begin the war on September 1, 1939, with the German invasion of Poland. Hundreds were killed the first night of fighting and again there is no definitive first casualty.
From an American point of view, the first casualties occurred from Japanese attacks on American Marines assigned to peacekeeping and refugee duty in China. Later, American Navy and Merchant Marine personnel were killed before America was officially in the war when Germany sank two American warships and some merchant vessels.
The first Americans to die in combat after the official start of American involvement were at Pearl Harbor, Hawaii. The 2 man crew of a Japanese midget submarine were killed by a shell from the destroyer Ward hours before the air attack began. The crew were: Skipper Akira Hiro-o and crewman Yoshio Katayama according to a Honolulu Star news report.
The UK History Learning Site says that the first American casualties were 35 American servicemen at the Army Air Forces Hickam Field. Names were not given.
It was the first combat tank. Produced in World War 1 It was the first combat tank. Produced in World War 1
Americas first battle was at pearl harbour in Hawaii.
Combat
Vertical Envelopment, or the use of helicopters in combat, was first introduced in the Korean war.
They were used for hand to hand combat if the enemy jumped into their trenches. This was the first war with extensive use of trench warfare.
It was the first combat tank. Produced in World War 1 It was the first combat tank. Produced in World War 1
maybe
Tanks
I believe it is tanks.
Tanks were first developed and used in combat by the British during World War I
Americas first battle was at pearl harbour in Hawaii.
Combat
As the name "World War" suggests, it involved most of the world. Major areas of combat included Europe, Africa, Asia, with some combat in North and South America.
Vertical Envelopment, or the use of helicopters in combat, was first introduced in the Korean war.
how was the fist pistol used in warfare it was used in close combat if nessasary
To simply end the war for world war 1, for world war 2 it was end the war and take down the Nazis
1st world war