The main battles of the Russo-Japanese War of 1904-1905?

At the first stage of the Russo-Japanese War, Japan began to gain victories. She first attacked Port Arthur in 1904 and damaged several Russian battleships. In the same year, the cruisers Varyag and Koreets were sunk in a battle near the port of Chemulpo. In February 1904, a mine exploded and the Russian ship “Petropavlovsk” sank together with a team of experienced military leaders led by Makarov. In April, Russian troops retreated to Liaoyang. Port Arthur was taken. In the Mukdon and Tsushima battles, Russia lost and was forced to give Japan a part of Sakhalin.