WW1 had shown how very vulnerable Britain was to hostile submarines in the Atlantic, and the development of bombers had made much of Britain vulnerable. After the fall of France, the enemy was much nearer and could easily use airfields in Belgium and France. The whole coastline opposite Britain, from the Arctic Circle to the border between France and Spain was in enemy hands. Joncey
Britain took place in the D-Day invasion, also known as the bloodiest invasion in the history of warfare.
Trench Warfare
During WW2, the common enemy of China was Japan. Communist vs Nationalist warfare would become a main problem when WW2 ended.
trench warfare
Airpower made killing a mechanical act rather than a personal act.
The machine gun changed warfare
The Battle of Britain was aerial warfare.
Nuclear weapons
First specify what you mean by 'then', as you are covering a wide timespan, during which warfare changed radically.
j ,b
Iron Bridge
Radar
Warfare changed in various ways during ancient times. For example, Roman legions revolutionized warfare through the tactics and formations they used.
What dramatic event changed Britain's relationship with Australia?
Crop rotation system developed in Britain during agricultural revolution increase crop yields by increasing nutrients in the soil.
Britain took place in the D-Day invasion, also known as the bloodiest invasion in the history of warfare.
The president's pay can not be changed during any one term of office.