You can get a huge amount of stone and wood by 
 following the following steps: 
 
 1. Build a castle with 1 ton stone and 1 ton wood 
    (or as less as possible)
 2. When the castle is built, extend the castle design 
    to use 100 tons of stone & 100 tons of wood
 3. As soon as you exit the castle design screen, demolish 
    the castle. You now have over 65000 tons of stone and 
    wood!!
 
 To surrender a big castle:
 Let 1500 archers shoot at the archers in the castle. When 
 they are put to death, press autocalc battle. The castle 
 is yours.
 
 400 farmers, 400 knights, 200 maceman:
 First, let the farmers slam shut the canal. Destroy the bridge. 
 Destroy all cans with a knight, and defeat the other soldiers  
 with your knights. Destroy the middle gate with your maceman, 
 defeat the rest and take the flag.
 
 To defend a castle:
 Put as many archers and crossbow-men into battle as you can and 
 let the computer decide. If you don't have these men, then 
 defend with knights and pike-men. 
 
  
 HexCheat:
 Load the savegame into the hexeditor and change the offsets 
 87.990, 87.991 and 87.992 to FF. Now you should have enough 
 money.