Fair enough, but for the purpose of this mod, it would be one vessel.
Mjolnir mass produced would be useless. Spartans take a large quantity of good genes to make. That's because they captured German tech. Not that it matters the Germans had ICBMs in WWII, the Allies with their scientists from the V2 rockets didn't have them for at least a decade. Not that it matters. The Covenant were hundreds if not thousands of years ahead of humanity. Infinity a 5km long warship took 20 years to build. To date the Covenant have 29km long warships and a 300+km city.
Lul they have slipspace detectors everywhere. Highly unlikely.
Imagine if you had enough mjonir Gen 2 units to issue to every ODST? And enough ODST Armour to fill the entirety of the UNSC marine corps?
Allied tanks never incorporated german tech, In fact it was quite the contrary, most german tanks didn't even have stabilisers until 1943ish.
Also In WW2 Countries had thier own focus' USA had the A bombs, Bat bombs and Supercarriers, Germany had Rockets (not ICBMs), chemical warfare (which thank the lord they never used) Panzers, and U boats, Italy had nothing, Japan had Biological and chemical warfare, Super battleships and rocket planes, Britain had the Chemical and biological weapons, Battleships, Cruiser tanks, Jets, Silly bombs and other ingenious devices. Saying one nation was more technological advanced that another is dependent on field of study.
Also should note that High charity was not made by the covenant intentionally.
Also Only one of them stations was able to pick up a fleet of 300 CCS class ships and even then it took a smart guy to figure out it was the covenant.