The Soviet Union would have lost a lot fewer people if it hadn’t been so willing to ally with Germany in the first two years of the war.
Not killing its own people would have helped too.
Are you just including combat related stuff like sniper kills? Or are you also including feats of logistics like building over 2,700 Liberty ships between 1941 and 1945 (largest number of ships produced of a single design).
I think it depends on how the term “impressive feats” is defined.
Does “the first real development of the jet airplane” count?
Those are both true.
Or the fact that the state of Texas alone produced 5 times more oil for the Allies in WW2 than was used by the entire Axis war machine, both German and Japanese?
Plutoand Mulberry impress the heck out of me.
"How will we supply our troops after they land?
We’ll adapt cable laying technology so we can run pipelines under the ocean and construct two prefabricated harbours, tow them across the channel and land men and material straight onto the beaches - you’ve got 24 months so get cracking."
And let’s not forget the Manhatten project.
“We’ll develop a super weapon based on cutting edge physics. Because we’re not certain which is the best approach to follow we’ll pursue two entirely separate paths, one of which uses an element first isolated during the project itself. We’ll need over 100,000 workers, two billion dollars and factories across the USA. There’s no guarantee it’ll be physically possible, and certainly it’s unclear whether we’ll have a usable product before the war ends.”
Okay, get it done."
“Oh, and keep this quiet! There’s a war on, you know!”
The Dowding system was mightily impressive, as was the Dunkirk evacuation.
But for sheer bravado and massive brass balls, the raid on St. Nazaire wins for me.
Both DiMaggio and Williams were American and did these things before Pearl Harbor so, sorry, they’re a year too early. 
(The hitting streak was a more remarkable feat.)
When I first read the OP, I, too, assumed “feats” to be constrained to technological developments. Obviously, I would need clarification from the school or newspaper as to what angle they are looking for.
One thing that puts the priority and scale of the Manhattan project in perspective is that they were having a hard time getting enough copper for wiring because of how much copper was being used for war production. Rather than try to pull copper from military use that would hinder other projects, they simply borrowed 15,000 tons of silver from Fort Knox for wiring. Construction of Y-12
Of course Axis, and other — unaligned such as the Chinese communists [ both the Soviets and the Americans supported the KMT under their boy, the Chinese Washington Chiang Kai-Shek: so Mao’s chaps can’t be considered Allies, but were non-nazi ( still, it’s complicated since many Chinese, including communists, had been trained and armed by Germany before the war, when Germany preferred China to Japan ) ] — forces must count.
However, the first half dozen at random off the top of my head, despite my being so totally bored with WWII and nazis it’s wasteful to spend time on this:
Skorzeny’s Rescue of Mussolini.
Siege of Cholm Pocket
Kesselring’s glacially delayed retreat up the scenic mountain chains of Italy
Battle of Midway ( admittedly I know nothing of the Pacific War nor naval affairs — but it was rather a killer )
The Battle of The Factory, Stalingrad ( both sides )
Taking of Crete by parachute
And as a bon bouche: the first mass glider assault in history, the Fort of Eben-Emael.
Actually these are starting to sound like Thief episodes: with Garret mixing it with the Hammerites and Pagans… Still, there were tens of 1000s of heroic deeds from each armed force of each nation. After a while the good and bad fades into the general background of ‘History’.
Sorry everyone, I clarified poorly. The poll doesn’t reflect the thread OP.
Do you *think *an American school or newspaper would want “Allied-only?”
Of cause it would only want Allied-only.
At school we never had anything directed at the other side being anything of any worth at all, the Japs were all 5ft tall and half blind the Italians were all just idiots and all the Germans were all evil.