In the second world war: You (or your teacher) may be thinking about "Blitzkrieg", which is German for 'lightning war'. This is rapid, mobile, high-intensity combat featuring the use of large formations of tanks & other armored vehicles that penetrate behind enemy lines and are supported by close air support such as dive-bombers to disrupt the defensive network of the enemy. The Germans also pioneered the use of cruise missiles & ballistic rockets.
In the first world war: You (or your teacher) may be thinking about unrestricted submarine warfare against merchant shipping, or gas warfare employed against Allied ground troops.
It was called Blitzkrieg.
Combat in World War I and in the 19th century differed mostly by degree, not by kind. That is, from the American Civil War (in the 1860s) onward, warfare was conducted with naval, ground, and air forces of a roughly similar kind in each conflict. At least three notable differences remain, however: the introduction of new aircraft capable of effective military actions; the use of gas-warfare by both sides; and the introduction of armored fighting vehicles (i.e., "tanks").
example of history introduction
Railroad transport and communicating by telegraph, I guess. Ah yes, submarine warfare.
helicopters that needed to be used in warfare.
What was Hitler's new "style" of warfare called
Bronze and iron were an important introduction because they were a new, stronger medium for weaponry. By creating bronze and iron weapons, warfare was revolutionized.
It was called Blitzkrieg.
submarine
Militarily, WWI saw the introduction of tanks and airplanes into warfare. This rendered the tactics of "trench warfare" obsolete in later wars, as the practice produced a catastrophic number of human casualties during WWI.
Trench warfare was one of the new forms of warfare introduced during World War 1. Another new form of warfare was chemical warfare.
The new one is called Call Of Duty Black Ops. But there is a newer one coming called Call Of Duty Modern Warfare 3.
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.
beta release
Most dramatically, WWI changed the nature of warfare from armies marching in an open field and facing each other in formations, commonly known as "maneuver warfare", to trench warfare. It was also the beginning of Mechanized Warfare, seeing the introduction of tanks, gas, cars, the Maxim machine gun, and other new weapons.You ask a very complex question... this is just the gist of the answer.
Trench warfare.
It did not your spelling is off. The Correct game names are Call of Duty 4 Modern Warfare (or COD 4) and Call of Duty Modern Warfare 2 (Sometimes called COD 6). The new Game will be Call of Duty Modern Warfare 3