Okay. I'm Brandenburg, and I allied with Wurzburg, Saxony and Magdeburg. Soon after, Poland attacks Prussia and the Teutonic Order. While Poland is busy, I declare war on Poland, and move my troops in. My allies join me in the war, but they never do anything with their troops. They just let them sit there, sometimes not even building more troops. Is there any reason for this, or any way I can make them get moving?