In the spring of 1187 , Isaac attacked Attack the fortress of Lovech , but failed Earnings_and_losses to capture Conquering it after a three-month siege .

The defense Defending of Sihang Warehouse took place Process_start from October 26 to November 1 , 1937 , and marked Recording the beginning Process_start of the end Process_end of the three-month Battle Hostile_encounter of Shanghai in the opening Openness phase of the Second Sino-Japanese War Hostile_encounter .