Complex sentence: They became estranged when Edward spurned the French diplomatic marriage that Warwick was seeking for him and instead married Elizabeth Woodville, widow of an obscure Lancastrian gentleman, in secret in 1464.
Split into simpler sentences: They became estranged when Edward spurned the French diplomatic marriage that Warwick was seeking for him. Edward instead married Elizabeth Woodville, widow of an obscure Lancastrian gentleman, in secret in 1464.