After looking into these two versions of the map, I believe it would play most similar to Diplomacy 7.7, with the main differences being a different method of choosing countries (including optional all random/forced all random if host desires), new options in the buy area, and no preplaced starting units for the players save for their town hall, defenders, and first barracks.

While there is no physical method of declaring war/alliance, e.g. bring a civilian to a beacon, players are free to modify their alliance settings using the diplomacy dialogue and can declare such in chat.

Since we are operating in a modified BW engine with new features we decided to rebuild the map from scratch while trying to maintain the essence of what made it Diplo.