The Wars of the Roses were a series of English civil wars for control of the throne of England fought between supporters of two English rival branches of the royal House of Plantagenet: the House of Lancaster (associated with a red rose), and the House of York (whose symbol was a white rose). The conflict lasted through many sporadic episodes between 1455 and 1487; however, there was fighting before and after this period between the houses.
Although minor armed clashes had occurred previously between supporters of York and Lancaster, the first open fighting broke out in 1455 at the First Battle of St Albans. Several prominent Lancastrians died at the hands of the Yorkists. Although peace was temporarily restored, the Lancastrians were inspired by Margaret of Anjou to contest York's influence, and a deadly feud between the two branches of the royal family ensued.
Fight resumed more violently in 1459. York and his supporters were forced to flee the country, but one of his most prominent supporters, the Earl of Warwick, invaded England from Calais and captured Henry VI at the Battle of Northampton. York returned to the country and became Protector of England, but was dissuaded from claiming the throne, though it was agreed that he would become heir to the throne (thus displacing Henry and Margaret's son, Edward of Westminster, from the line of succession). Margaret and the remaining Lancastrian nobles gathered their army in the north of England.
When York moved north to engage them, he and his second son Edmund were killed at the Battle of Wakefield in December 1460. The Lancastrian army advanced south and released Henry at the Second Battle of St Albans, but failed to occupy London, and subsequently retreated to the north. York's eldest son, Edward, Earl of March, was proclaimed King Edward IV. He gathered the Yorkist armies and won a crushing victory at the Battle of Towton in March 1461.