In 1651, Safavid troops clashed with those of the Tsardom of Russia in the North Caucasus, known as the Russo-Persian War of 1651-1653. The main issue involved the expansion of a Russian garrison on the Koy Su River, as well as the construction of several new fortresses, in particular the one built on the Iranian side of the Terek River. The Safavid government then sent troops and destroyed the fortress while expelling its Russian garrison. Soon after, another conflict on the war's eastern front had started. At the same time, the Russian government sent an embassy, led by courtier Prince Ivan Lobanov-Rostovsky and steward Ivan Komynin, to Isfahan to seek a peaceful settlement of the conflict. Abbas II agreed with the settlement offer as he wanted to settle the issue in the far eastern territories first. The war ended with no further territorial gains, but the Safavids manage to increase their influence in the North Caucasus.