Cromwell's men

• Armor-plated warships
• Old ___ (Boston sight)
• Puritans press on the borders
• "Old ___"
• Oliver Cromwell
• Something Old
• The Virginia and the Monitor, e.g
• "Old" ship's name

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ironside \I"ron*side`\, Ironsides \I"ron*sides`\, prop. n. A nickname for Oliver Cromwell. A nickname for Edmund II of England. --RHUD