On what date did Britain declare war on Germany following an " unsatisfactory reply " to the British ultimatum that Belgium must be kept neutral ?
A division emerged at various meetings of the " Reich " ’s leadership between those led by the Chancellor who wanted to see what would happen following an Austrian attack on Serbia , and the military led by Moltke and Falkenhayn , who urged that Germany immediately follow up an Austrian attack on Serbia with a German attack on Russia .