OLLI offices will not be staffed until Tuesday, January 6th for offsite staff training. Guides are in the mail and will arrive in your mailbox soon!

Instructor: Mark Callen

Biography:

MARK CALLEN has a lifelong interest in warships andsea battles. He has held OLLI sessions on the British Empire, the Civil War atSea, the Titanic, and the Battle of Midway.

Classes by this instructor

(HIS238) HOW JOHN ERICSSON SAVED THE UNION

This is an OLLI Digital Library recording and is available to view until May 31, 2026.

This course explores the pivotal 1862 naval battle at Hampton Roads, where a Confederate ironclad devastated the U.S. Navy, prompting a Union response led by John Ericsson and his revolutionary warship, the Monitor.
Thursday, January 1, 2026, OLLI Digital Library