Japan and China troops fought on the frontier. This was called the Marco Polo Bridge Incident. Stalin saw Japan as a threat so he provided support for China. Britain France US also gave support to China as they were strongly against Japan. An estimate of 10-20 million people died from the Chinese Civilians. Japan occupied Manchuria until the end of WW2. Source: http://www.history.co.uk/study-topics/history-of-ww2/sino-japanese-war

It is a treaty between the Nazi Government and Germany. Its a treaty where each country doesn't ally or aid other countries when it comes to war. A German-Soviet Pact where in a signatory bond was signed not to attack each other. It was later became invalid because of Hitlers attack to the Soviet Allies. https://www.ushmm.org/wlc/en/article.php?ModuleId=10005156

Germany attacks Poland without any warnings Blitzkrieg. Germany used a tactic of bombing. Germany was able to go through the polish defenses as they were outnumbered. Germany was attacking from different places like Slovakia, East Prussia. This led to the Ribbentrop-Molotov Nonaggression Pact. This assured that Germany could invade Poland without any opposition. http://news.bbc.co.uk/onthisday/hi/dates/stories/september/1/newsid_3506000/3506335.stm

Blitzkrieg is another word for sudden war. Germany tried the Blitzkrieg tactic on Poland in 1939. This tactic was also used for the invasions of Belgium, the Netherlands and France in 1940. The Blitzkrieg creates disorganized enemy force. Hitler liked to use this tactic because it results in short military campaigns. http://www.history.com/topics/world-war-ii/blitzkrieg

When Germany lead by Hitler invaded the USSR violating the non aggression treaty. Germany wanted to conquer the soviet territory. Germany was so unprepared they under estimated their enemy. The weather was too harsh on germans so they got defeated. The operation Barbarossa failed, and Nazi faced a two-front war. Germany could not win. This was the turning point of the USSR. http://www.holocaustresearchproject.org/nazioccupation/opbarb.html

Japan attacked the US in Pearl Harbor in the US territory of Hawaii. They invaded Pearl Harbor to stop the unnecessary interference of U.S. President in the internal affairs of Japan.This attack lead to the US entry of WW2. Japanese won the Attack on Pearl Harbor. They used a new tactic and a great plan which was successful as they earned victory. http://www.historynet.com/pearl-harbor

It happened in Bataan, Philippines when Japanese coquered the Philippines. They captured 12,00 Americans and the rest are philipinos. Japanese militaries had bestowed aristrocity to the prisoners. Some are beheaded and shot along the road, died of hunger and lack of water. They are being punished along the road. It was a 60 mile journey. Many died and did not make it. http://www.eyewitnesstohistory.com/bataandeathmarch.htm

The Battle at Midway Is one of the US Victories against Japan. While the Americans lose only Yorktown, Japan loses four aircrafts during these battle. American once again gained victory against Japanese militaries during the World War II. http://www.history.com/this-day-in-history/battle-of-midway-begins

the Manhattan Project was a project conducted by ALBERT Einstein, and Enrico Fermi led by the US. This project produced the first atomic bomb.On July 16, 1945, at New Mexico. This was the start of the Nuclear age. They bombed new Mexico to test if it was successful.
http://www.ushistory.org/us/51f.asp

When Germany fought Russia for Stalingrad.On February 2, 1943, General Paulus surrendered. About 150,000 Germans had died in the fighting. This was the turning point of Russia.This battle was considered to be the bloodiest battle of WWII. About 1 Million Russian soldiers died.

Operation Gomorrah was when Britain bombed Hamburg.Britain had developed a new technology which helped it win. they used a device called "window". Along with Britain's bombing, US was helping them with destroying Germany. More than 30,000 people died and 280,000 buildings were destroyed. This had a great effect on Hitler's power in world war 2.
http://www.history.com/this-day-in-history/operation-gomorrah-is-launched

Soviet Allies began to plan invading Italy as a push trhough to the Axis. They beleive that this will decreases the ability of the Axis to produce more and their opportunity to increase their supplies.They began to plan and invade Italy. As a result Allies began to work together. http://www.history.com/this-day-in-history/allies-invade-italian-mainland

Allied soldiers crossed the English channel and stormed 5 beaches of normandy France, lead by the US. The operation to attack was coded for "neptune". Only Juno and Gold beach were linked by the first day. After a week all five beaches got linked to the plan. The operation was successful and the allies expanded as they drove into Germany from the west.
http://www.britannica.com/event/Normandy-Invasion

Hitler wanted to split the Allied armies by surprising them with a blitzkrieg across the Ardennes to Antwerp in Europe. Germany couldn't defeat the allies as their casualties were a lot. Germany faced all the West ( British, US, France, Canada ) so they got destroyed. Germany lost 30,000 soldiers and 44,000 infantry forces were killed or captured. They also lost a significant amount of weapons.
http://worldhistory2battleofthebulge.weebly.com/results-and-significance.html

The Battle of Iwo Jima was when the U.S. Marines captured the island of Iwo Jima from the Japanese Imperial Army. An estimate of 70,000 US Marines and 18,000 Japanese soldiers
took part in this battle.The US captured 216 Japanese soldiersand the rest were killed. The island was declared secured on March 16, 1945 after 36 days. this was the bloodiest battle of WW2.http://www.nationalww2museum.org/focus-on/iwo-jima-fact-sheet.pdf

Okinawa was invaded by the Allied, but Japanese had strong resistance about it. Japanese fought with the allied. Gunfire was all around it was like a "typhoon of steel" and it was "the blodieest battle of the Pacific War". It is between the U.S. Tenth Army against the The Japanese Thirty Second Army. After more than two months of battle, Allied Nations won. Many casualties, both commanders died in different circumstances. http://www.history.com/topics/world-war-ii/battle-of-okinawa

The UK and the US celebrate Victory in Europe Day. When German troops throughout Europe finally laid down their arms. In Prague, Germans surrendered to their Soviet enemy. Lost more than 8,000 soldiers. The German surrender was realized in a final cease-fire. The main concern of many German soldiers was to escape the grasp of Soviet forces, to keep from being taken prisoner. The impacts of the VE Day is that the unconditional surrender of Germany was signed at Rheims on May 7.

This marked the end of WWII. Enola Gay dropped a five-ton bomb on Hiroshima in Japan however it had the same impact of a 15,000 tons of TNT. It ruined cities and immediately killed 146,000 people. After three days Nagasaki got bombed. This resulted in the death of 80,000 people. After the bombing Japan declared it's surrender. http://www.history.com/this-day-in-history/atomic-bomb-dropped-on-hiroshima

Since then, both August 14 and August 15 have been known as “Victory over Japan Day,” or simply “V-J Day.” The term has also been used for September 2, 1945, when Japan's formal surrender took place aboard the U.S.S. Missouri, anchored in Tokyo Bay.
http://www.nationalww2museum.org/learn/education/for-students/ww2-history/at-a-glance/v-j-day.html

Allied powers wanted to bomb Eastern Germany (Berlin).The plan had a purpose of shattering the german's confidence. It resulted with 220,000 casualties with 110,000 killed. It was bombed by the RAF Bomber Command, and by the USAAF Eighth Air Force as part of the Allied campaign of strategic bombing of Germany. Germany's morale was ruined so their plan was successful.http://ww2orc.tripod.com/id15.htm