Question

what is the second world war reason

Answer 1

Reason for causes of war
The second world war caused by fascist aggression and the failure of democratic power to stop this aggression.
The rearmament of Germany was a cause for war because it broke the Treaty of Versailles (28thJune, 1919)

The remilitarization of the Rhineland (7th march, 1936) was a cause of war because it broke the Treaty of Versailles and the Locarno Pacts (1925)

The Rome-Berlin Axis (October 1936) was a cause of war because it united the aggressive fascist powers and divided Europe into hostile camps.

Chamberlain’s appeasement policy (after may 1937 – March 1939) was a cause of war because it broke the Treaty of Versailles and Treaty of St. Germain (10th September, 1919)

The Anschluss of Germany with Austria (13th march, 1938) was a cause of war because it broke the Treaty of Versailles and Treaty of St. Germain (10th September, 1919)

The Nazi annexation of the Sudetenland after the Munich conference (29th September 1938) was a cause of war, because it broke the Treaty of St. Germain.

The Nazi occupation of Czechoslovakia in March 1939, cause war because it defied the Munich agreement and ended Britain’s appeasement policy.

The Nazi-Soviet Pact (29th August 1939) caused war because it sealed Poland’s downfall.

The Nazi invasion of Poland (1st September 1939) caused war because Britain had guaranteed Poland’s borders.

Answer 2

Answer:

Hitler's invasion of Poland in September 1939 drove Great Britain and France to declare war on Germany, marking the beginning of World War II. Over the next six years, the conflict would take more lives and destroy more land and property around the globe than any previous war.