Describ the major incident of military aggression which provoked the outberak of the second world war?

The major incident of military aggression that provoked the outbreak of the Second World War was the German invasion of Poland on September 1, 1939. This act of aggression violated international agreements and sparked a chain reaction of declarations of war from other countries, including Britain and France. The invasion of Poland by Nazi Germany marked the beginning of a global conflict that would last for six years and result in the deaths of millions of people.

German Invasion of Poland (September 1, 1939)