Political map of East Asia and the Western Pacific 27 October 1938 (Fall of Wuhan): Although the defeat at Tai'erzhuang (Battle of Taierzhuang) was a setback, the Japanese were soon on the offensive again. By October, they had seized most of the coastline, including Canton (Canton Operation), and marched inland to capture the new Nationalist headquarters at Wuhan (Battle of Wuhan). Less auspiciously for Japan, tensions with the Soviet Union had led to a border clash at Lake Khasan (Battle of Lake Khasan) in July.