The battle of France begins on May 10, 1940. Technically disadvantaged (the Third Reich spent the years leading to the war secretly rearming), the French forces are rapidly overwhelmed. The last Allied squadrons evacuate the continent on June 17, 1940. The Channel will give the British and their allies a chance to reorganize (an invasion of the . is being planned by the Nazis, but won’t occur).
The Battle of Britain has already started. Along with the defence of England, the RAF concentrate on bombing missions on the continent, attack missions of Third Reich vessels and submarines, and international deployment.
During World War 2, considerable technical progresses are made, such as the radar and the jet engine. In 1944, the first British jet aircraft becomes operational; it’s the Gloster Meteor.
Kokutai , meaning the uniqueness of the Japanese people in having a leader with spiritual origins, was officially promulgated by the government, including a text book sent about by the Ministry of Education.  The purpose of this instruction was to ensure that every child regarded himself first of all as a Japanese and was grateful for the "family polity" structure of government, with its apex in the emperor.  Indeed, little effort was made during the course of the war to explain to the Japanese people what it was fought for; instead, it was presented as a chance to rally about the emperor.