The Underground Resistance Network fought the Nazis. They did a phenomenal job too. In Italy they fought them overtly. The French Resistance did that too and took Paris back themselves once the Allies landed. The other countries had to conduct covert methods of conducting actions against the Nazis but that was needed badly too.
The organizations that fought the Nazis in secret were collectively called "the resistance" or "the underground."
The Nazis fought the Soviets at Stalingrad.
In a way, yes. German immigrants and decendants of German immigrants in other countries fought against the Nazis in World War II.
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Not all all. Britain fought against the Nazis, Sweden aided but not militarily, Portugal was independent, Switzerland collaborated but never fought. Russia was invaded but never conquered. Spain was fascist but never fought. Italy, France, Hungary, Romania had various levels of control by Nazis.
It helped to defeat the nazis, just as America defeated the nazis in many of the other countries as well as America defeating the Japanese who were on the nazis side. Japan attacked China so badly.
Perhaps you are thinking of World War 2. However, that war was not about 'saving the Jews'. The various countries that fought in the war did so to uphold their national interests (as they saw them) or because they were attacked.
The Nazis would travel by plane or boat when they invaded countries
Yes, The NAZIS did fight in Africa and were called the Africa korps. This division was led by commander Erwin Rommel, who later tried to assasinate Adolf Hitler but he failed and was executed. The Nazis fought mainly the British in Northern Africa by the countries of Egypt, Morocco, Algeria, And Libya.
Some ways in which partisans fought the Nazis were by trying to sabotage their intelligence gathering. They also used to get rid of their stocks of weaponry and ammunition.
The Hungarians were on the Axis side of the war. They fought with the Nazis in Operation Barbarossa and were in the Battle of Stanlingrad too. They fought in some battles in Hungary and I think Poland too. They turned against the Nazis at the end of the war. They fought against them in the Lake Balatan Offensive and the Russians as they went against the Nazis on the Eastern Front.