In contrast to the Japanese strategy of rapidly gaining ground to control Manchuria, Russian strategy focused on fighting delaying actions to gain time for reinforcements to arrive via the long Trans-Siberian Railway, which was incomplete near Irkutsk at the time. On 1 May 1904, the Battle of Yalu River became the first major land battle of the war; Japanese troops stormed a Russian position after crossing the river. The defeat of the Russian Eastern Detachment removed the perception that the Japanese would be an easy enemy, that the war would be short, and that Russia would be the overwhelming victor. This was also the first battle in decades to be an Asian victory over a European power and marked Russia's inability to match Japan's military prowess. Japanese troops proceeded to land at several points on the Manchurian coast, and in a series of engagements, drove the Russians back towards Port Arthur.