Comparisons - air, land, sea

Sea
Warships Size Comparison (year - length - tonnage) > .  

Ship Classes WW2 - 101 - mhv > .

WW2 Ship Class Guide - long version - mhv > .

21-9-27 Royal Navy Ships And Subs Explained > .

All Types of Warships Explained - nwyt > .

What's The Difference Between Warships (USN)? - Defense > .

Warships - atl >> . 
Naval Warfare Ships and Weapons - Mats >> .

Military - AmVi >> .

Air

WW2 Aircraft Maximum Speed and Size Comparison 3D > .

Aircraft Size Comparison -AmVi >> . 
Helicopters - Mats >> .

Military - AmVi >> .

Land
Tank Size Comparison 3D > .

Tanks Comparison - AmVi >> .  

Tanks, AVs - tb >> .
Tanks! - Mats >> . 

World War Two & Second World War Tanks - ttm >> .

The Funnies - ttm >> .

Best from The Tank Museum - ttm >> .  

Tank Chats from The Tank Museum - ttm >> .

TOP 5 Tanks - ttm >> .

Great War, Tank Centenary & First World War - ttm >> .

Education - ttm >> .
Military Equipment, Tanks, Combat Vehicles - Mats >> .

Artillery - Mats >> . 

Firearms - Mats >> .  

Military - AmVi >> .

Military Forces

Expansion - PLA, PLAAF, PLAN ..

Naval

Expansion - PLA, PLAAF, PLAN ..

Propulsion

Diesel vs Nuclear .. 

WW3 Deterrence ..