Surprised by the rapidity of the South Vietnamese collapse Conquering , North Vietnam transferred Military_operation the bulk of its northern forces Military_operation more than to the south in order to capture Control the South Vietnamese capital of Saigon in time to celebrate Social_event their late President Ho Chi Minh 's birthday and end Process_end the war .

Surprised Swedes lost Earnings_and_losses the battle Hostile_encounter , and the Poles recaptured Conquering the town .

Surprised by news of an invasion Attack , Song general Tong Guan retreated Escaping from Taiyuan , which was besieged Besieging and later captured Conquering .