On the field of Marston Moor, Yorkshire, 1644, the north of England
was conquered by Cromwell with his invincible little army. The
following year Cromwell's "Ironsides," who "trusted in God and kept
their powder dry," gained the decisive victory of Naseby, 1645, in the
Midlands. (See map facing p. 252.) After the fight papers belonging
to the King were picked up on the battlefield. They proved that
Charles intended betraying those who were negotiating with him for
peace, and that he was planning to bring foreign troops to England.
The discovery of these papers, which were published by Parliament, was
more damaging to the royal cause than the defeat itself.