Complex sentence: A skaldic tradition describes the bridge's destruction in 1014 by Æthelred's ally Olaf, to divide the Danish forces who held both the walled City of London and Southwark.
Split into simpler sentences: A skaldic tradition describes the bridge's destruction in 1014 by Æthelred's ally Olaf,. See: to divide the Danish forces who held both the walled City of London and Southwark.