what are the main causes of the second world war
Causes of World War II Among the causes of World War II were Italian fascism in the 1920, Japanese militarism and invasions of China in the 1930s, and especially the political takeover in 1933 of Germany by Hitler and his Nazi Party and its aggressive foreign policy. The immediate cause was Britain and France declaring war on Germany after it invaded Poland in September 1939.
Causes of World War I Consensus on the origins of the war remains elusive since historians disagree on key factors, and place differing emphasis on a variety of factors. This is compounded by changing historical arguments over time, particularly the delayed availability of classified historical archives. The deepest distinction among historians is between those who focus on the actions of Germany and Austria-Hungary as key and those who focus on a wider group of actors. Secondary fault lines exist between those who believe that Germany deliberately planned an European war, those who believe that the war was ultimately unplanned but still caused principally by Germany and Austria-Hungary taking risks, and those who believe that either all or some of the other powers, namely Russia, France, Serbia and Great Britain, played a more significant role in causing the war than has been traditionally suggested.
Vietnam War There are several competing views on the conflict, with some on the North Vietnamese and National Liberation Front side viewing the struggle against US forces as a colonial war and a continuation of the First Indochina War against forces from France and later on the United States[79] especially the light of the failed Geneva Conference calls for elections. Other interpretations of the North Vietnamese side include viewing it as a civil war especially in the early and later phases following the U.S interlude between 1965 and 1970[80] as well as a war of liberation.[79] The perspective of some Provisional Revolutionary Government of the Republic of South Vietnam, the successor to the Viet Cong were motivated in part by significant social changes in the post-WW2 Vietnam, and had initially saw it as a revolutionary war supported by Hanoi[81][82] The pro-government side in South Vietnam viewed it as a civil war, a defensive war against communism[80][83] or were motivated to fight to defend their homes and families.[84] The U.S. government viewed its involvement in the war as a way to prevent a communist takeover of South Vietnam. This was part of the domino theory of a wider containment policy, with the stated aim of stopping the spread of communism.[85]
World War II The start of the war in Europe is generally held to be 1 September 1939,[9][10] beginning with the German invasion of Poland; the United Kingdom and France declared war on Germany two days later. The dates for the beginning of war in the Pacific include the start of the Second Sino-Japanese War on 7 July 1937,[11][12] or even the Japanese invasion of Manchuria on 19 September 1931.[13][14]