Following the death of Ben Jonson in 1637, Davenant was named Poet Laureate in 1638. He was a supporter of King Charles I in the English Civil War. In 1641, before the war began, he was declared guilty of high treason by parliament along with John Suckling, after he participated in the First Army Plot, a Royalist plan to use the army to occupy London. He fled to France. Returning to join the king's army when the war started, he was knighted two years later by king Charles following the siege of Gloucester.