 Complete the following phrase:   After the Second World War Millwalls form was poor and the club dropped into the Third and Fourth Division of the Football League. West Ham have never played below the Second Division in their history and often played a league or two above Millwall. The two sides did not play each other competitively between 13 October 1959 and 7 October 1978, making the 1960s the only decade the teams have not met. Despite the infrequency of their meetings, both sets of supporters still consider the other club their major rival. During these years, the Hammers enjoyed considerable success, winning the FA Cup in 1964, 