Some Events of WWII
A Timeline
.....1938............39............1940............41............42............43............44.............45.............46............1947.....
Germany invades Poland
blitzkrieg
autobahn
sudden invasion
Blitzkrieg (German, "lightning war"; About this sound listen (help·info)) is headline and Anglicised word describing force concentration of tanks, infantry, artillery, air power and rapid speed to break through enemy lines, and proceeding without regard to flanks.

During the interwar period, aircraft and tank technologies matured and were combined with systematic application of the German tactics of infiltration and bypassing of enemy strong points.[1] When Germany invaded Poland in 1939, Western journalists adopted the term Blitzkrieg to describe this form of armored warfare.[2]

"Blitzkrieg" operations worked during the Blitzkrieg campaigns, 1939 - 1941. These operations were dependent on surprise penetrations (e.g. the penetration of the Ardennes forest region), general enemy unpreparedness and an inability to react swiftly enough to the attacker's offensive operations.[3]
Autobahn (pronounced /tobn/; German: [atoban]  ( listen), plural Autobahnen) is the German word for a major high-speed road restricted to motor vehicles capable of driving at least 60 km/h (37 mph) and having full control of access, similar to a motorway or freeway in English-speaking countries.

In most countries, it usually refers to the German autobahn specifically. The advisory speed limit (Richtgeschwindigkeit) of the German autobahn is 130 km/h (80 mph), but there is no general speed limit. Austrian and Swiss autobahns have general speed limits of 130 km/h (80 mph) and 120 km/h (75 mph), respectively. In German, the word is pronounced as described above, and its plural is Autobahnen; in English, however, the segment auto is typically pronounced as in other English-language words such as automobile. The official name of the autobahn in Germany is Bundesautobahn (BAB) (Federal Motorway). Autobahns are built and maintained by the federal government (as are the federal highways), thus the name "Federal Motorway". They first were built in the 1920s and, in the 1930s, the official name was Reichsautobahn (freeway of the Reich).
An invasion is a military offensive consisting of all, or large parts of the armed forces of one geopolitical entity aggressively entering territory controlled by another such entity, generally with the objective of either conquering, liberating or re-establishing control or authority over a territory, forcing the partition of a country, altering the established government or gaining concessions from said government, or a combination thereof. An invasion can be the cause of a war, beas a part of a larger strategy to end a war, or it can constitute an entire war in itself. Due to the large scale of the operations associated with invasions, they are usually strategic in planning and execution.
Pearl Harbor
what is it?
Pearl Harbor is a harbor on the island of Oahu, Hawaii, west of Honolulu. Much of the harbor and surrounding lands is a United States Navy deep-water naval base. It isz also the headquarters of the U.S. Pacific Fleet. The attack on Pearl Harbor by the Empire of Japan on December 7, 1941, brought the United States into World War II.
japanese empire
The Empire of Japan (Kyūjitai: ; Shinjitai: ; pronounced Dai Nippon Teikoku; literally Great Imperial Japan or Great Imperial Japanese Nation, officially Great Japan, Empire of Greater Japan or Great Japanese Empire; more widely known as Imperial Japan or the Japanese Empire) was a Japanese political entity that existed during the period from the Meiji Restoration in 1868 until its defeat in World War II in 1945.

The country's rapid industrialization and militarization under the slogan Fukoku Kyōhei (?, "Enrich the Country, Strengthen the Army"), led to its emergence as a world power eventually culminating with its membership in the Axis alliance and the conquest of a large part of the Asia-Pacific region.

After several large scale military successes during the first half of the Pacific War, the Empire of Japan also gained enormous notoriety for its war crimes against the conquered inhabitants of people within their Empire. After suffering numerous defeats and the atomic bombings of Hiroshima and Nagasaki, the Empire of Japan surrendered to the Allies on September 2, 1945. A period of occupation by the Allies followed the surrender and dissolution of the Empire, and a new constitution was created with American involvement. American occupation and reconstruction of the country continued well into the 1950s eventually forming the current modern Japan.

The Emperors during this time, which spanned the Meiji, Taishō and Shōwa eras, are now known in Japan by their posthumous names which coincide with those era names: Emperor Meiji (Mutsuhito), Emperor Taishō (Yoshihito), and Emperor Shōwa (Hirohito).
text