The Battle of Philippine Sea, the Battle of Britain, the Battle of the Bulge, D-Day, the Battle of Stalingrad, the Battles of Iwo Jima, Okinawa, Leyte, and Saipan were major allied victories that put immense strain and crippling onto the Axis-powers.
Central powers major victories
Lots of nations fought on the allied side of WW1. Some major ones were the United Kingdom, France, USSR, and the United States.
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Iran
The main enemies of the Allied Nations in WW2 were Germany, Japan and Italy. There were some other Axis nations, but, they were very small.
Ireland is part of the European Union and therefore 'Allied' with all of its nations. Ireland isn't really in any particular quarrel with any country at the moment, so in that sense it's Allied with everyone.
As in the case of the Allies, membership of the Axis was fluid, with some nations switching sides or changing their degree of military involvement over the course.
Some of the victories in world war 2 are victorious/ Some of the victories in world war 2 are victorious/
There have been major battles through the time of the world, all with many different outcomes. Some include WW I and WW II, both of these outcomes were victorious for the allied troops.
Some notable victories the U.S. had against Britain are WW1 and 2.
The Allied Forces did not have a strategy until after they were attacked because the Generals did not believe there was a major offensive going on in the Ardennes. This was to their peril. Since I am not a military strategist and do not know the military lingo I am sending you to some links to help you understand how the Germans and the Allied Forces fought the battle.
The main allies of the US are Britain and France. However, there are many more countries in all the continents that are allied with the US.