
In the board game Diplomacy, which is best played by seven players, each player represents one of the Great Powers of Europe in the years just prior to World War 1. There are 34 supply centers on the Standard map, 22 of which are controlled by one of the seven powers, and the other 12 are neutral. The supply centers can support one military unit at a time, so if a power gains a supply center over the course of the year, it can build new ones as well. The object of the game is to use your armies and fleets to conquer as much of Europe as you can, specifically, you must capture and be in possession of at least 18 of the 34 supply centers on the map. Powers that control these supply centers are able to raise and maintain armies and fleets.
| Characteristics | Values |
|---|---|
| Number of supply centers | 34 |
| Number of supply centers controlled by one of the seven powers at the start | 22 |
| Number of supply centers that are neutral at the start | 12 |
| Number of supply centers needed to win the game | 18 |
| Number of units that can be supported by each supply center | 1 |
| Number of units that can be created by a player at their unoccupied home supply centers | 1 per center |
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What You'll Learn
- Control of 18 supply centers means you've gained control of Europe and won the game
- Supply centers are the goal of the game and are marked with a black dot
- Powers that control supply centers can raise and maintain armies and fleets
- Players can only have as many units as supply centers
- Supply centers can support one military unit at a time

Control of 18 supply centers means you've gained control of Europe and won the game
In the board game Diplomacy, which is set in Europe in the years before World War I, the goal is to control 18 supply centres. There are 34 supply centres on the standard board, and each power must control 18 of them to win the game. Supply centres are represented by provinces on the board and are marked with a black dot. Each province produces enough supplies to maintain an army or fleet.
The number of armies and fleets a player can have is determined by the number of supply centres they control. A player must have a unit in the supply centre during the Winter phase to claim it. Once a supply centre is claimed, the player does not need to keep a unit there to maintain control, but if another player moves a unit into the vacant supply centre, they will take it over.
If a player has more supply centres than units, they can build new units by placing them in unoccupied supply centres in their home country. However, if their home supply centres are occupied by their units or owned by other players, they must wait until the next Fall move to raise any new units.
It is important to note that occupation of a supply centre only occurs during the Fall move. If a unit moves into a supply centre during a Spring move and then moves out during the Fall move of the same year, the original owner retains control of the centre.
As gaining control of 18 supply centres can take a long time, players may agree to a shorter game by setting a time limit.
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Supply centers are the goal of the game and are marked with a black dot
Diplomacy is a strategic board game set in the years just prior to World War 1. The game is played with seven players, each representing one of the Great Powers of Europe: England, Germany, Russia, Turkey, Austria-Hungary, Italy, and France. The objective of the game is to use your armies and fleets to conquer as much of Europe as possible, with the winner being the first player to control 18 supply centers, or more than half of the total 34 supply centers on the standard map.
Supply centers, denoted by a black dot, are a crucial aspect of the game as they allow players to raise and maintain armies and fleets. Each supply center can support one military unit at a time, and players can build new units at their unoccupied home supply centers. It is important to note that players cannot disband below the number of supply centers they possess, as this would allow them to instantly replace units in the field with new units back home.
To claim a supply center, a player must have a unit occupying that center during the Winter phase, which occurs at the end of Fall. If a supply center is already claimed by a player, they do not need to keep a unit there to maintain control. However, if another player moves their unit to an occupied supply center, they will take over control of that center.
The supply centers are distributed across the 34 land provinces on the board, with 22 controlled by one of the seven powers and the remaining 12 starting as neutral. Only seven supply centers are completely landlocked, emphasizing the importance of fleets for conveying armies across bodies of water and supporting coastal battles.
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Powers that control supply centers can raise and maintain armies and fleets
Diplomacy is a strategic board game set in the years just prior to World War 1. The objective of the game is to use your armies and fleets to conquer as much of Europe as possible. There are 34 supply centres on the standard map, 22 of which are controlled by one of the seven powers, and the remaining 12 are neutral. The powers that control these supply centres can raise and maintain armies and fleets.
Each supply centre can support one military unit at a time. This means that if a power gains a supply centre, it can build new units. However, a player can only create new units in their unoccupied home supply centres, and only one per centre at a time. For example, if a player has more armies than necessary and wants a fleet to capture a far-away supply centre, they cannot simply disband an army and build a new fleet on a home supply centre.
To win the game, a power must control 18 supply centres (a simple majority) during Autumn. If a power loses all of its home supply centres, it may continue to play but cannot build new units until it recaptures at least one. It is important to note that players who control no supply centres are eliminated from the game.
In addition to raising and maintaining armies and fleets, supply centres are also crucial for transportation. Fleets are necessary to convoy armies across bodies of water to coastal provinces. For example, English fleets are essential for England to convoy armies to the mainland.
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Players can only have as many units as supply centers
In the board game Diplomacy, players can only have as many units as supply centres. There are 34 supply centres on the standard map, 22 of which are controlled by one of the seven powers, and 12 that are neutral. Each supply centre can support one military unit at a time. If a power gains a supply centre, it can build new units.
A player may create new units at any of their unoccupied home supply centres, but only at these centres, and only one per centre at a time. If a player loses all of their home supply centres, they may continue to play but cannot build new units until they have recaptured at least one of their home supply centres.
To win the game, a power must control 18 supply centres (a simple majority) during Autumn. If a player controls no supply centres, they are eliminated from the game. The game often ends in a draw, which is generally agreed upon by all players or declared after a pre-set time limit has been reached.
The supply centres are marked with a black dot, and they are the goal of the game. They are a central part of the game's victory conditions and strategy.
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Supply centers can support one military unit at a time
In the board game Diplomacy, supply centers are a key part of the game's strategy and victory conditions. There are 34 supply centers in total, spread across the 34 land provinces on the standard map. Of these, 22 are controlled by one of the seven powers, and the remaining 12 are neutral. The goal of the game is to use your armies and fleets to conquer as many supply centers as possible, with 18 being the magic number to gain control of Europe and win the game.
Each supply center can support one military unit at a time. This means that if a power gains a new supply center, they can build new units. However, players can only create new units in their unoccupied home supply centers, and only one unit per center. It's important to note that you can't have more units than supply centers, and vice versa.
If a player loses all their home supply centers, they can still play but cannot build new units until they recapture at least one of their home supply centers. This rule ensures that players cannot instantly replace units in the field with new ones back home. To maintain control of a supply center, a player must have a unit in that center during the Winter phase, at the end of Fall. If another power moves a unit into a supply center, they will take it over.
The supply centers are marked with black dots on the board and are a central focus of the game, with players engaging in diplomacy, bargaining, and joint military planning to gain control of these valuable assets.
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Frequently asked questions
There are 34 supply centers in total, 22 of which are controlled by one of the seven powers and 12 that start as neutral.
The aim of the game is to use your armies and fleets to conquer as many of the 34 nations or provinces on the map that contain supply centers. To win, a player must control 18 supply centers (a simple majority) during Autumn.
Each supply center can support one military unit at a time, so if a power gains a supply center, it can build new units. A player may create new units at any of their unoccupied home supply centers, but only at these centers, and a maximum of one per center at a time.

























