A list of special unit traits currently in the game:

airborne: Unit can be transported by air

submerged: Unit operates below water

submergable: Unit can dive underwater

camouflaged: Unit is invisible until an enemy unit moves into it

explosives: Unit can destroy bridges, supply sources, ...

bridgeBuilder: Unit can construct pontoon bridges

weakFlanks: Unit suffers more from outflanking attacks

tunneling: Unit can travel through underground tunnels

concealable: Unit can't be spotted from range or air in certain terrain types (ex: Jungle)

minelayer: Unit can deploy mines

mineClearer: Unit can clear mines

amphibious: Unit can switch to amphibious mode (shallow water)

kamikaze: Unit attacks by throwing itself at the enemy

singleShot: Unit can only fire once (ex: B29 Nuclear Bomber)

noSupply: Unit does not require supply

fieldArmour: Unit can trade speed for additional "field armour"

entrenchSupport: Unit assists adjacent friendlies in entrenching their position

carrierBased: Unit can operate from aircraft carriers

highRiskReturn: High randomisation in combat odds (ex: Jap Infantry in "banzai" mode)

guerilla: Unit does not suffer from efficiency loss over difficult terrain (ex: Australian Commandos)

assault: Unit has bonuses against entrenched positions ​