Upon the heels of this ultimatum came another one, served on the Council of the People's Commissaries by the German Ambassador, Count von Mirbach. According to a dispatch, the new ultimatum, too, dated May 10, had a bearing on the prisoner question, but in addition demanded complete cessation of arming troops and the disbandment of units already formed. This demand produced an unusual stir in Russia. The Commissaries held an extraordinary session at which the situation created by the ultimatum was discussed. The Bolsheviki showed no intention of complying with the German ultimatum. On May 12 Foreign Minister Chicherin instructed the Russian Ambassador, M. Joffe, at Berlin to "try to obtain from Berlin cessation of every kind of hostility." The Germans had announced their intention to capture Novorossiysk, on the Caucasian coast of the Black Sea, under the pretext that the Russian warships, which had escaped seizure at Sebastopol and which are stationed at Novorossiysk, constituted a danger for the German vessels. The instruction added that the German invasion of Russian territory was causing much unrest in the country. COUP IN THE UKRAINE On April 18 the State Department at Washington announced that, according to an authentic report, the Teutons intended to dissolve the Ukrainian Rada and set up a Government of their own. On April 24 a Ukrainian financier prominent in aiding the Germans was arrested in the name of "the Committee of Ukrainian Safety." The German Vice Chancellor, Friedrich von Payer, in his speech before the Main Committee of the Reichstag, said that this secret organization aimed at driving the Germans out of the country and was even planning the assassination of all German officers. It included a number of prominent Ukrainians, several Ministers of State among them, and held its meetings at the house of the Minister of War. An investigation was demanded by the German Ambassador, but the Rada took no action. Two days later General von Eichhorn, Commander of the German Army in the Ukraine, proclaimed "a state of enhanced protection," making all offenders of order subject to the jurisdiction of German court-martial. He had previously issued a field-sowing decree, necessitated, as the Germans explained, by the fact that the Rada had taken no measures concerning the field sowing, without which the country could not meet its treaty obligations relative to the delivery of grain to Germany. On April 28, while the Rada was in session, German troops entered the hall and arrested a number of its members, the Minister of War among them. The next day a number of landowners and rich peasants who were holding a convention in Kiev declared its sessions permanent, voted the dissolution of the Rada as well as the cancellation of the order convoking the Constituent Assembly on May 12, and proclaimed General Skoropadsky Hetman (Supreme Military Chief) of the Ukraine.