An oasis (plural oases) is a place for a source of materials. You can find them at the map. Once you claim them, oases lose 1 level every 24 hours until they become level 0. When they reach 0, you automatically lose that oasis. They give you a certain amount of materials.
Here are the oases and their signs.
Oasis - Iron Edit
The sign for an iron oasis is a pile of iron.
Oasis - CropEdit
The sign for a crop oasis is a light green field.
Oasis - StoneEdit
The sign for a stone oasis is a big upright stone and a bunch of smaller ones surrounding it.
Oasis - WoodEdit
The sign for a wood oasis is trees. In most regions, the wood oasis is the most common oasis you can find.
The amount of materials given per level of an oasis are as follows:
|Level 1 Oasis||
|Level 2 Oasis||250/Hour|
|Level 3 Oasis||350/Hour|
|Level 4 Oasis||550/Hour|
|Level 5 Oasis||850/Hour|
|Level 6 Oasis||1250/Hour|
|Level 7 Oasis||1900/Hour|
|Level 8 Oasis||2700/Hour|
|Level 9 Oasis||
|Level 10 Oasis||5000/Hour|
The maximum troops in oases are: