Because he captured Spanish treasure ships.
Sir Francis Drake
He was made a knight by the Queen (Elizabeth I).
Year 1581.
On his arrival from a three-year voyage in 1580, Queen Elizabeth I made him a knight.
Queen Elizabeth 1
Queen Elizabeth The 1st
Queen Elizabeth 1
In April 1581, Francis Drake was knighted by Queen Elizabeth on board the Golden Hind.
Queen Elizabeth 1
Queen Elizabeth exucuted him.
Elizabeth the First
the Queen Elizabeth the 1st