To manage your wars you have to use in-game commands. Use these commands in your Guild Channel
/war invite,enemyguildname,100,500 - This will invite an enemy guild for a war to 100 frags with 500 gp payment (payment is optional)
/war accept,enemyguild - Accept the invitation to start a war. It will be displayed on this page once you have accepted an invitation.
/war reject,enemyguildname - Reject the invitation to start a war.
/war end,enemyguildname - Ends an active war with another guild.
/war cancel,enemyguildname - This will cancel the war invitation you sent.
Guild balance commands (in the guild channel):
/balance donate amount - donate 'amount' gold to the guild.
/balance pick amount - only for guild leader, withdraw 'amount' money from the guild.