It was the first battle between ironclad ships.
On March 9, 1862
The Merrimac,
The battle between the USS Monitor and the formerly known Union ship called the USS Merrimack, was the first ever battle between ironclad warships. The Merrimack had been reconstructed as an ironclad and renamed the CSS Virginia. Although the Monitor received the most damage between the two ships, for all practical purposes it was a draw.
If the question asks only about the crews of the two ships, the Monitor had a crew of 59, and the Merrimack had 320, but the entire two-day Battle of Hampton Roads involved thousands more. The Merrimack was joined by five CSN gunboats, and there were five USN warships at Hampton Roads. [The Merrimack sank two of them before the Monitor arrived.]
The first battle between ironclads at Hampton Roads turned out to be a draw. The battle between the USS Monitor and the Confederate Merrimack became a moot point as they never battled again. The South had to sink the CSA Merrimack as it took in too much water. The USS Monitor, was in a draw with the Merrimack, and eventually was lost at sea. As it turned out, the gains would have been minimal.
1st battle btwn iron ships
It was the first naval battle between two ironclads.
261 people died at the Battle of the Monitor and Merrimack (renamed the CSS Virginia).
The monitor vs. Merrimack took place in 1862.
The fight between the USS Monitor and the CSS Virginia (Merrimack) took place March 9, 1862 during the Battle of Hampton Roads. Neither ship could gain the upper hand in the battle and it is considered a draw.
Lieutenant John Worden, USN on the Monitor. Captain Franklin Buchanan, CSN on the Virginia (previously the Merrimack).
It changed naval warfare for ever. As soon as the British heard about the battle they immediately set to work to armour their navy.