After the fall of the second of Lord Derby's short-lived attempts at governments in 1859, Lord Palmerston returned to power, this time in alliance with his former rival Lord John Russell, in what is regarded as the first Liberal government. Palmerston remained as Prime Minister until his death in 1865, when Russell succeeded him. However, disunity within the party caused the fall of the government in the following year, and Lord Derby formed another Conservative administration.