WW1 Country

You fight in the Battle of Masurian Lakes. You take several POWs and injure many of them. Then Turkey enters the war on your side and helps you bomb Russia. Then, as you are advancing through Belgium, the Belgians destroy the railroad lines and slow the transport of German Supplies. Then, you move into France, and it doesn't really work, but you eventually stop them. Then you send ships to sink all of the British Supplies, and the British are mad. Now, you are contemplating attacking them. What should you do