Downgraded Wars/Terrains

Natural terrains=

Plain
Plain and its variants are the most common terrains throughout the game.

The derived terrain types are as follows:
 * Snowy Plain
 * Wasteland
 * Snowy Wasteland
 * Desert
 * Oasis
 * Shoal

Bush
Bush

The derived terrain types are as follows:
 * Swamp
 * Withered Bush
 * Snowy Bush

Forest
Forest

It has a snowy variant.

Jungle
Jungle

Hill
Hill

It has a sandy variant and a snowy variant.

Mountain and its variants
Mountain

It has a snowy variant.

High Mountain
High Mountain

It has a snowy variant.

River
River

It has a frozen variant.

Lake
Lake

It has a frozen variant.

Sea and its variants
Artificial terrains=
 * Sea
 * Ocean
 * Reef

Bases

 * Headquarters
 * Ground Force Base
 * Air Force Base
 * Navy Base

Facilities

 * Factory
 * Airport
 * Harbour

Settlements

 * City
 * Town
 * Village

Ruins
Other terrains=

Blank
Blank, as its name shows, is literally nothing. No unit can be placed on it.