Index: data/helpdata.txt
===================================================================
--- data/helpdata.txt	(revision 12553)
+++ data/helpdata.txt	(working copy)
@@ -771,6 +771,40 @@
 in the field and supported by that city are also transferred \
 (but not those sitting in other cities).  So make sure the \
 other player isn't getting a better deal than you expect.\
+"), _("\
+     There are six diplomatic states between players: Never met, War, \
+Cease-fire, Armistice, Peace, and Alliance.\
+"), _("\
+     The first time you meet - when one of your cities or units \
+comes into direct contact with a unit or city owned by another player - \
+the diplomatic state between your civilizations will turn into War. \
+During War, you can freely move you units inside enemy territory and \
+attack units and cities at will.\
+"), _("\
+     When two players decide to end hostilities between them, they can \
+agree on a Cease-fire treaty. After a set number of turns, the Cease-fire \
+will lead back to War. Upon first contact with an AI player, it will \
+automatically offer you a Cease-fire treaty.\
+"), _("\
+     If you wish for a more permanent peaceful coexistence with another \
+player, you may enter an Armistice, that after another set number of turns \
+will turn into a permanent Peace treaty. Breaking an Armistice will drop \
+you directly back to War.\
+"), _("\
+     At the moment two players enter into the diplomatic state of Peace, \
+all units belonging to either player that happen to be within the other's \
+borders, will be automatically disbanded according to the treaty. After \
+this, you may not move units into the other's territory until you either \
+declare War, or forge an Alliance. Breaking a Peace treaty will drop you \
+directly back to War.\
+"), _("\
+     An Alliance is the ultimate diplomatic relationship between two \
+players. In this state, you may move units into each other's cities and \
+your units may share the same square. An allied AI player will freely give \
+you its world maps, shared vision, as well as seriously consider trading \
+technologies and cities. The only drawback with an alliance, is that it \
+will draw you into to any wars your ally enters against other players. \
+Breaking an Alliance will drop you to an Armistice treaty.\
 ")
 
 [help_governor]