thing about Hearts of Iron III .. you control tech research, production, diplomacy, intelligence ,.even politics to some extent.
So ..playin the US .. I started buildin infantry in 1936
..by the time Poland was invaded the US could have put MacArthur in command of a full strength army
of 5 Corps, 5 Divisions per Corp ..and most of a second army
..and they along with the Belgium/French/Netherland armies would have stopped the Germans cold right on the norhern border of Belgium.
All the allies needed to do was stop them while bringing up their production/tech research ..
..by 1943 the Allies dictate where the breakthrough is going to happen ..swamp locally, run to Berlin, mop up.
So far the toughest challenge is runnin the German war machine .. for me at least.
It's easy to get side-tracked (like Hitler did over and over again) and next thing you know you have a D-Day type landing and all yer guys are scattered across the world.
Easy to get gutted like a fish while trying to regroup for defense.
So I focus on Navy buildup as second priority ..fleet carrier groups hunting with a few battlewagons to break invasion fleets.
And Naval bombers ..they are wicked effective when they get to 1944 vintage and beyond with radar guided bombs an such.
Hitler tried to do far too much with too little..
So far my game plan to start seems to be very viable.
By the time I attack Poland in May, 1939 I have:
135 reserve army infantry divisions of 3 brigades each.
3 battleships, 1 Fleet carrier, 10 transports and support ships in a 30 ship fleet.
4 fighter interceptor wings of 3 squadrons each, building to 7 wings.
1 Airborne Army, 3 Korps and building to 5 Korps of 5 divisions each.
2 AirTrans wings of 2 interceptor, 4 transport planes each
2 Naval bomb wings of 2 squadrons each, building to 8 wings.
5 Tactical bomb wings of 2 squadrons each, building to 8 wings.
It's enough to clean out the entire continent, british isles, and by late 1940 I am settin up for invading russia in March of 1941.
I dont invite anyone else to join germany ..I dont do the pact with russia .. I dont do the Czech occupation, prefer to take it along with Poland.
Initial attack on Poland on May 1st, 1939, followed by declaration of war the next day on Denmark, Netherlands, Belgium, Luxembourg, and Switzerland -evil grin-
Invasion of Finland followed by Sweden and Norway follow Polands demise, along with taking Lithuania, Latvia, and Estonia.
then Hungary, Romania, Bulgaria, Yugoland, and Greece.
Cross the channel to the british isles with air landings initially taking Dover, Portsmouth, London soon after the Netherlands falls.
Usually a few major fleet engagements as I ferry troops to Dover to take out the british isles and Ireland.
When France surrenders I declare war on Vichy France, Spain, and Portugal.
When Spain falls I declare war on Italy.
Dropping a few paratroop divisions behind strong point defenses really works wonders ..
surrounding and destroying major forces makes for huge holes to advance through.
The spanish armies are destroyed on their northern border and it's a walk from there.
Same with Italy.. cuttiing off the peninsula entirely it becomes a very short campaign
as the Italians have almost nothing left once their armies are destroyed.
Hammer and Anvil tactics .. lethal

By the time I invade Russia I have my full paratroop army.
I land an unbroken string of divisions 3 provinces behind russian lines stretching from
Odessa north to just a few provinces from Leningrad.
The entire russian front collapses in less than a month, with nothing left of them.
It's a walk to Moscow.
..and so on

-Frank aka GE