1st Tech Level
Basic Infrastructure: The Lowest level of Non-military development. This allows for the Construction of Infrastructure One and some other basic things, including the basic Infantry unit. Some resources come with this, too, as does the Peasant Worker.
Defensive Tactics: This is where you get your Machine gun units.
Air Combat: Basic Air units (F-51s, Yak-9s La-9s), Resources, and the Airbase building.
Assault Infantry: Barracks, as well as your Assualt Infantry.
Naval Tactics: Destroyers, Transports, and naval facilities.
Infantry Artillery: Mortars for everybody and Recoiless Rifles for the Allies.
Mobile Warfare: Armored Cars
2nd Tech Level
Light Infrastructure: Infrastructure 2, some more resources, the Laborer (Worker Upgrade).
Air Defense: AA units and buildings.
The Jet Engine: MiG-15, F-80
Aireal Bombardment: B-26 Intruder, Tu-2
Amphibious Assualt: Marines
Naval Warfare: Submarines, Shore Battery Improvement. Allies get Escort carriers and F-4u Corsair.
Light Artillery: Light Artillery Pieces and field guns.
Armored Warfare: Heavy Armored Cars/Light Tanks
Mobile Artillery: Self Proplelled Guns.
3rd Tech Level
Heavy Infrastructure: Infrastructure 3, more resources, Rail Roads, Field Headquarters (Forbidden Palace).
Advanced Jet Engine: F-86 Sabre, MiG-15bis
Strategic Bombing: B-29 for Americans, Strategic (perscision) Bombing for B-29, B-26, and Tu-2
Air Power: Il-10, 4-84E Thunderjet, AD Sky Raider.
Vertical Flight: Transport Helicopters.
Special Operations: A Special Infantry unit for each side. Royal Marine Commandos for U.N., Anti-Vehicle Rifle for North Korea, Shock Infantry for China, and.. soemthing for South Korea.
Naval Power: Cruisers
Special Naval Tactics: A Special Sea Unit. For the U.N. it is the Perch Transport submarine. No Idea for anyone else.
Naval Aviation: Fleet Carriers, F9F Panthers, F2 H-2 Banshees.
Heavy Artillery: Heavy Artillery pieces like the Long Tom
Armored Tactics: T-34, Medium tanks.
4th Tech Level
Advanced Infrastructure: Engineer Unit, Highest level ressources.
Special Munitions: Napalm Bombs and Propganda Leaflets drops.
Peace Talks: Panmujon Confrence Small Wonder. Reduces War Weariness.
Naval Dominace: Battleships.
Heavy Armor: Heavy Tanks.
