Shi Shian was commander of 3rd Regiment of the Northeastern Army guarding Shanhai Pass, the easternmost fortress of the Great Wall of China. The Northeastern Army (Traditional Chinese 東北軍 Simplified Chinese 东北军 pinyin Dōngběi Jūn was the Chinese army of the Fengtien clique until the unification Shanhaiguan or Shanhai Pass ( literally "Mountain and Sea Pass" is a part of the city of Qinhuangdao, in Hebei province People's Republic On January 2, 1933, the Japanese 8th Division issued an ultimatum, and then attacked the pass with the support of 3 armoured vehicles. Events 366 - The Alamanni cross the frozen Rhine River in large numbers invading the Roman Empire. Year 1933 ( MCMXXXIII) was a Common year starting on Sunday (link will display full calendar of the Gregorian calendar. On January 3, Regimental commander Shi Shian, unable to withstand this attack, evacuated the pass after losing half his force while the Japanese incurred casualties estimated at 500.