Yaroslav was now master of Kiev and Novgorod and Grand Prince of Russia, but the family arrangements of Vladimir’s many heirs had not yet adjusted themselves. From Isiaslav, Kniaz of Polotzk, sprang a line of turbulent princes who contributed a fair share to the domestic troubles of Russia during the next hundred years.[18] Still more formidable for the time being was Mstislav, whose family portion was Tmoutorakan, a province bordering on the Black Sea. [Sidenote: (1016)] In conjunction with the Greek Imperial General Andronicus he had driven the Khazars from the Tauride and put a finishing touch to their existence as a European State. Other victories over the Tcherkess tribes in his neighbourhood swelled both his ideas and his resources, and he began to feel his remote steppe-girded province too small for him. In 1023, while Yaroslav was away in the Souzdal country, Mstislav burst with his warriors into the grand principality and seized upon Tchernigov in the Sieverski plain. The harassed Grand Prince fled to Novgorod--his usual city of refuge--and sent urgent messengers over the Baltic to call in the ever-ready Varangians to his aid. In response came a large force, led by one Hako (in the Russian Chronicle Yakun), who has come down to posterity as suffering from sore eyes and wearing a bandage over them broidered with gold--a human touch in the portrait of one of these half-mythical seeming vikings. The avenging army came into the Tchernigov land and met their foes on the banks of a small river, the two forces sighting one another just as night was falling and a nasty storm creeping upon them. As the storm broke over the Grand Prince’s host, accompanied by thunder peals and torrents of rain, out of the night there rushed in on them the war-men of the intrepid Mstislav, who rivalled with his wild battle-shock the tumult of the elements. In the darkness men fought hand to hand with a foe they could not see; the storm in the heavens rolled away, but the humans fought on, their arms flashing in the gleam of the stars, “a combat without comparison, murderous, terrible, and truly frightful.”[19] A charge by Mstislav and his body-guards decided the day--or rather the night--and Yaroslav fled from the field of this epic struggle to his haven in the North. Hakon of the sore eyes left on the ground his gold-wrought bandage as a trophy for the victorious Tchernigovskie. Mstislav did not push his advantage to the extent of depriving Yaroslav of his princely dignity, and five years later a pact was made between the brothers which left the younger in possession of the lands he had won east of the Dniepr. Yaroslav was thus enabled to turn his attention to the outlying regions of the realm, where his authority had lapsed during the long civil strife. In the year 1030 Livland was again brought under some sort of subjection, and the town of Youriev (the German Dorpat) founded near Lake Peipus. The domestic troubles of Poland, where