                               Concept : Trades

 Trades empower Empire countries to trade Empire units for cash.

To offer a trade, a nation must execute the sell command.   The  sell  command
creates a trade item that defines the nations to whom the trade offer is made,
and the price at which the trade will be executed.

In order to see and execute a trade, a nation must have  diplomatic  relations
with the offering nation, and vice versa.

When a trade is executed, the ownership of the item being traded  is  changed,
but no location change is effected.

See also : buy, cancel, sell, trade.

