Hoping for some advice on my current ironman Venice game. Built up my relations to get into the HRE, alliance with Austria, who helped me release Croatian cores from Hungary, then out of the blue, breaks alliance (probably because Burgundy stomped all over them in the next war). Ok 5 years later able to ally Austria again, 6 months later they break alliance again(Austria is not at war). How can Austria's diplomatic attitude towards me switch from friendly, to neutral to hostile within 10 years. I have no claims on any of their cores, and they don't have any on mine. However they do have a Conquest CB on my vassal Croatia. Because of Austria's desire for Varaso they break alliance with me, and view me as hostile? Seems a bit over the top to me.