Tōgō Heihachirō
On the morning of 10 August, the First Pacific Squadron sortied from Port Arthur in an attempt to break through the Japanese fleet blockading the port and reach Vladivostok. The Russian squadron consisted of six battleships, "Tsesarevich", , , , and "Poltava", along with four protected cruisers and eight destroyers. The Japanese fleet, commanded by Vice Admiral Tōgō Heihachirō, was comprised four battleships, , , , , two armoured cruisers and , as well as seven protected cruisers.