Oasis (Kingdoms)

Oases are fields on the map, which can't be settled on, but which can be captured by kingdoms and be annected by villages to increase the production. Wild oases are protected by animals, the nature troops.

As for all NPCs, one receives only 50% of the usual off points for defeating animals in an oasis.

Appearance

Two oasis on the map

Oases can be found on the map on some landscape fields. Wood oases can be found exclusively in forests, clay oases in canyons, iron oases in mountains and crop oases either in waterholes or in crop acres. Double oases (e.g. wood + crop) can be found exclusively on the non-crop-type (e.g. wood + crop in forests). Double crop oases are in crop acres. Landscape fields with oases have a resource icon on them, making it easy to distinguish from regular landscape fields.

Type	Wood	Wood + Crop	Clay	Clay + Crop	Iron	Iron + Crop	Crop	Double crop
Resource Icon
Landscape (example)

Wild oases aren't distinguishable from free ones by optics alone. Wild oases have animals however, free oases don't.

Wild Oasis

At the start, all oases in the world are wild. To make use of an oasis, it has to be freed by killing all animals with attacks first. As soon as all animals area dead, the oasis is free and can be used. If the oasis abuts on the ow kingdom (counting diagonally), it will be part of the kingdom upon freeing it.

Wild oases produce small amounts of resources and have a storage capacity of 50 per animal, which lives in the oasis.

Apart from attacks and espionages, no interactions with wild oases are possible.

Free Oasis

An oasis without animals is a free oasis. It can be annected, reinforced and attacked.

Free oases, that are part of a kingdom, generate an one tile large area for it, containing only the oasis. The area is considered to be fully part of the kingdom, i.e. it can be used for tribute paths as well as for the capital-to-capital connection for the kingdom union. Enemy kingdoms can steal an oasis, if it abuts on their area (counting diagonally), by killing all troops in the oasis. Then, the oasis becomes a part of the enemy kingdom and generates area for that kingdom now. Existing annexations will not be dissolved thereby. Free oases of a kingdom stay part of it, even if they don't abut on it anymore, e.g. after closing a treasury. They still generate their area in this case.

Free oases become wild again after an indeterminate time. This can be prevented by sending at least one unit as reinforcement or by annecting it.

Free oases have a defense bonus for reinforcing troops, compareable to the water ditch. The defense bonus depends on the oasis type.

Annexation

Free oases can be used to increase the resource production of a village. For that, it has to be annected in the embassy of the appropiate village by selecting an oasis of free choice in the tab oasis. As soon as an oasis is selected, it gets annected and it starts to take effect. Every village can annect up to three oases. Annected oases can be removed and replaced in the embassy at any time. Upon destruction of the embassy, all annected oases are removed.

Requirements for the annexation:

• The village has a sufficient embassy level (level 1 for the first oasis, level 10 for the second level 20 for the third).
• The oasis is free.
• No other village of the same player has already annected the same oasis.
• The oasis is inside the 7x7 area around the village (i.e. x and y coordinate may each differ by at most 3).

Oases, that belong to a foreign kingdom, can be annected normally, but troops don't produce resources and don't exert influence there.

After the annexation, the oasis increases the production of the village by a certain percentage. Two factors are taken into account, firstly the type of the oasis and secondly the rank of the player in the oasis ranking. Additionally, the oasis can be reinforced with troops to further increase the production, but there's a maximum of troops, that can produce resources in an oasis. While one can send more troops as reinforcement, some troops may not produce resources. Troops only produce resources, if the oasis belongs to the political kingdom.

The %-production bonus affects the base production of the village (i.e. it does not effect the bonus production of resource boosters or the production of troops).

Ranking

Every oasis has a ranking, in which all players, that annected it, are listed. The more influence a player exerts on an oasis, the better is his rank. The influence of a player is the sum of the influences of his villages, that are inside the 7x7 of the oasis plus the amount (not consumption) of his troops in the oasis. Troops only exert influence, if the oasis belongs to the political kingdom. The influence of a village is calculated by the following formula: $Influence={\frac {Population}{Distance\ to\ the\ oasis}}$

The better a rank of a player in the ranking, the higher the %-production bonus and the more troops of him can produce resources there:

Rank	Prod. Bonus 25%	Prod. Bonus 50%	Max. Troops
1	25%	50%	250
2	20%	40%	200
3	15%	30%	150
4	10%	20%	100
5+	5%	10%	50

Example

The production of a village with four claypits level 10, brickyard level 5, rank 2 in a clay oasis and gold production bonus is calculated like this:

Production Site	Prod. by definition	Calculation	Result	Production Type
4x Claypit level 10	200 clay per hour each	4x 200	800 clay per hour	base production
Brickyard level 5	25% of the base production	25% * 800	200 clay per hour	bonus production
Rank 2 in clay oasis	20% of the base production	20% * 800	160 clay per hour	bonus production
Gold production	25% of the production	25% * (800 + 200 + 160)	290 clay per hour	gold production
Total	Sum of all productions	800 + 200 + 160 + 290	1450 clay per hour	total production

Types

Each oasis has one or two resource types, for which it grants a bonus. The defense bonus depends on the types aswell and only counts for free oases.

Type 1	Type 2	Rank 1 prod. nonus	Prod. per troop	Defense bonus
Wood	-	25% Wood	1 Wood	50%
Wood	Crop	25% Wood + 25% Crop	1 Wood + 1 Crop	25%
Clay	-	25% Clay	1 Clay	50%
Clay	Crop	25% Clay + 25% Crop	1 Clay + 1 Crop	25%
Iron	-	25% Iron	1 Iron	100%
Iron	Crop	25% Iron + 25% Crop	1 Iron + 1 Crop	50%
Crop	-	25% Crop	1 Crop	0%
Crop	Crop	50% Crop	2 Crop	0%

Differences to Travian: Legends

• In Travian: Legends können Oasen nur von einem Spieler annektiert werden, in Travian Kingdoms können mehrere Spieler eine Oase nutzen. Die Oasenrangliste und die Einflussmechanik gibt es dort nicht.
• In Travian: Legends gibt es auf regulären Spielwelten in dem grauen Natarengebiet auch Oasen mit 50% Holzbonus, 50% Lehmbonus oder 50% Eisenbonus.
• In Travian: Legends produzieren Truppen in Oasen keine Rohstoffe.
• In Travian: Legends müssen Oasen mittels Angriff mit Held annektiert werden und können nicht einfach ausgewählt werden.
• In Travian: Legends müssen Oasen über den Heldenhof annektiert werden. Dieses Gebäude ist in Travian Kingdoms mit der Botschaft verschmolzen.