I want to know the answer to the following question:
Who were the three Liandong Han bannermen who were instrumental in the taking of southern China?
All the background I'm provided with is that "Normally the Manchu Bannermen acted only as reserve forces or in the rear and were used predominantly for quick strikes with maximum impact, so as to minimize ethnic Manchu losses; instead, the Qing used defected Han Chinese troops to fight as the vanguard during the entire conquest of China.". Is that enough to answer the question?
Answer: no