Passage: When the Russo-Swedish War broke out in 1741, the government of Anna Leopoldovna appointed him Commander-in-Chief as the most experienced among Russian generals. Lacy quickly struck against Finland and won his last brilliant victory at Lappeenranta (August 1741). Lacy's force, however, was poorly supplied and he was forced to withdraw to St Petersburg. The following year he rallied his forces and proceeded to capture Hamina, Porvoo and Hämeenlinna, by August encircling more than 17,000 Swedes near Helsinki and effectively bringing the hostilities to an end.

Question: Where was Lacy's final win?
Lappeenranta