A lot...... probably easiest if I answer this as a timeline. Hope this helps!
1939
Sept 1 - Germany invades Poland.
Sept 3 - England and Allies (at this stage - France, Australia and New Zealand) declare war on Germany.
Sept 6 - South Africa declares war on Germany
Sept 17 - the Soviet Union invades Poland.
Nov 30 - Soviet Union invades Finland.
1940
April 9 - Germany invades Norway and Denmark. Denmark surrenders on day of invasion, Norway holds out until June.
May 10 - Winston Churchill appointed British Prime Minister. Germany invades Wester Europe - Luxembourg, Holland and Belgium. Luxembourg surrenders.
May 12 - Germany invades France.
May 14 - Holland surrenders. Home Guard created in Britain.
May 27 - Dunkirk - 340,000 British and French troops are evacuated from French soil, many by volunteers in dinghys and fishing boats from England.
May 28 - Belgium surrenders
June 4 - last of the forces evacuated from Dunkirk.
June 9 - Norway surrenders.
June 10 - Italy enters the war on the side of the Germans and declares war on England and France.
June 14 - Germany takes Paris
June 30 - Germany takes the Channel Isles - the only British soil to be occupied by Germany.
June 21 - Italy invades southern France
June 22 - France surrenders
July 9 - Britain starts night bombing raids on Germany
July 10 - Battle of Britain begins
Sept 7 - the Blitz begins on London.
Sept 13 - Italy invades British-held Egypt
Sept 20 - Germany, Italy and Japan sign the Tripartite Pact. Japan enters the war on the side of Germany.
Oct - Italy invades Greece.
Nov - Slovakia, Hungary and Romania join the war on the side of the Germans.
1941
March - Bulgaria joins the Axis (German allies)
April 6 - Germany invades Greece and Yugoslavia.
May 10 - House of Commons in London damaged by air raid
June 22 - Germany invades Russia
Dec 7 - Pearl Harbour in USA attacked by Japan, USA enters the war the following day.
Dec 25 - Hong Kong surrenders to Japan
1942
Japan catches up for lost time....
Jan 2 - Japan takes Manila in the Phillipines
Feb 15 - Japan takes Singapore
May 5 - Battle of the Coal sea between US and Japan navies
May 30 - Americans start bombing Germany from Britain
Nov 8 - British and US troops win back North Africa.
Dec 11-13 - Germany and its allies declare war on US.
1943
19 April - May - Warsaw Ghetto Uprising in Poland - the largest single revolt by Jews against the Nazis during the war.
May 16 - the Dam Buster raid.
Sept 18 - Italy surrenders.
Oct 10 - Italy turns turncoat and declares war on Germany.
1944
June 4 - Rome freed by the Allies
June 6 - D Day landings
June 12 - First doodlebug lands in Britain
Aug 15 - Allied forces land in southern France
Aug 20 - Allied forces liberate Paris
Aug/Sept - Warsaw uprising - the largest ever civilian revolt in history
Sept 11 - US troops enter Germany
Oct 20 - US troops land in the Philippines
Dec 16 - Battle of the Bulge
1945
Jan 12 - Soviets liberate Warsaw and Krakow in Poland
Feb 13 - Soviets capture Budapest, capital of Hungary
April 16 - Soviets launch their final offensive, encircling Berlin.
April 30 - Hitler and Eva Braun commit suicide
May 7 - Germany surrenders
May 8 - Winston Churchill announces VE Day. WWII ends in Europe.
After Germany invaded Poland, World War II in Europe began. There were many treaties made across Europe prior to the war because of the fear of Another Country invading it. The downside is, when one country attacks, it triggers a chain reaction and there you have it, a world war. That is kind of how World War II started, and that is why the UN tries to lessen armistices signed that could start another world war.
Britain and France declared war on Germany.
Germany invaded Poland and Russia wanted to share.
Monitored the events.
Germany during ww2, Sweden in 1655In World War 2 Poland was invaded by Germany.
Germany invaded Poland on September 1st 1939. On September 3rd 1939, Britain and France declared war on Germany.
Germany invaded France and Poland also it invaded Austria. World War 2 started because Germany said to England they wouldn't invade Poland but they did - so Poland is the easiest country to remember that was invaded!
Germany invaded Poland
Germany invaded Poland.---Apex
Germany invaded Poland
Germany invaded Poland and Russia wanted to share.
World War II officially began after Germany invaded Poland. The invasion of Poland caused England and France to declare war on Germany.
Germany invaded Poland
allied by treaty they declared war
germany invaded poland
Germany invaded Poland.
Austria Italy France Poland Russia
Monitored the events.
Germany during ww2, Sweden in 1655In World War 2 Poland was invaded by Germany.