In 1460 the Yorkists invaded from Calais and marched north , taking the Lancastrians by surprise .
The first half of this century were ruled by the three kings of the House of Lancaster - Henry lV , Henry V , and Henry Vl .
In 1460 the Yorkists invaded from Calais and marched north , taking the House of Lancaster by surprise .
The first half of this century were ruled by the three kings of the House of Lancaster - Henry lV , Henry V , and Henry Vl .