Battle of Mukden

The Battle of Mukden (奉天会戦, Hōten kaisen), one of the largest land battles to be fought before World War I and the last and the most decisive major land battle of the Russo-Japanese War, was fought from 20 February to 10 March 1905 between Japan and Russia near Mukden in Manchuria. The city is now called Shenyang, the capital of Liaoning province in China.

Involving 610,000 combat participants and 164,000 combatant casualties, it was the largest modern-era battle fought prior to World War I, and possibly the largest battle in world history at that point. The scale of the battle, particularly in the amount of ordnance being expended, was unprecedented in world history. The Japanese side alone fired 20.11 million rifle and machine gun rounds and 279,394 artillery shells in just over ten days of fighting (yet the Russians still fired more), matching the ammunition consumption of the German army in the entire 191-day Franco-Prussian War and more than the British had fired during the entire Second Boer War. The battle was a decisive strategic victory for the Japanese and, coupled with their victory at the Battle of Tsushima four months later, proved critical in ending the war in their favour.

Following the Battle of Liaoyang (24 August to 4 September 1904), Russian forces retreated to the river Sha Ho south of Mukden and regrouped. From 5 October 1904 to 17 October 1904, during the Battle of Shaho, the Russians unsuccessfully counter-attacked, but managed to temporarily slow the Japanese advance. A second Russian counter-offensive, the Battle of Sandepu, fought from 25 to 29 January 1905, was likewise unsuccessful.

Though the combined Russian army led by General Aleksey Kuropatkin was set to receive reinforcements via the unfinished Trans-Siberian Railroad, the effects of the Bloody Sunday and the now-ongoing unrest at home placed a strain on the manpower of the whole Imperial Army as much of its resources now had to be dedicated in the quelling of the uprisings throughout its territories. Therefore, the Russian force was expected to receive little to no reinforcements and supplies from home.

The situation for the Japanese was hardly better. Though the capture of Port Arthur by General Maresuke Nogi freed up their 3rd Army, which then advanced north to reinforce the Japanese lines near Mukden in preparation for an attack, the manpower reserves of the Japanese army had been drained by February 1905. With the arrival of General Nogi's 3rd Army, Japan's entire fighting strength was concentrated at the vicinity of Mukden. The severe casualties, bitter cold climate, and approach of the Russian Baltic Fleet created pressure on Marshal Ōyama to effect the complete destruction of the Russian forces, rather than just another victory from which the Russians could withdraw farther into Manchuria.

The Russian line to the south of Mukden was 90 miles (140 km) long, with little depth and with a central reserve.

General Kuropatkin had thus disposed his forces in a purely defensive layout, from which it would be difficult to impossible to execute an offensive without opening a major gap in the lines.

On the Japanese side (Japanese Manchurian Army),