3.30 P.M.: Germany sends ultimatum to Russia. Pourtalès instructed to tell the Russian government that German mobilisation must follow “unless within twelve hours Russia suspends all war measures against ourselves and Austria-Hungary and gives us a definite assurance to that effect. Please notify M. Sazonov of this at once and wire hour of notification”.
It does not make clear for Germany mobilisation means immediate military action and war. [More]