The 27-year-old Liverpool captain took drastic action after his wife Alex Curran was threatened at their £4.5million home while he was playing in France.
The security men, whose regimental motto was Who Dares Wins, are now guarding Gerrard's home around the clock.
A friend told the Daily Mirror: "Stevie just felt that something had to be done to protect his wife, himself and his children. The safety of the ones he loves was the priority. These guys will now be there for him 24 hours a day. The family can sleep soundly."