Dec. 7 marks the 75th anniversary of the Attack on Pearl Harbor, an event that shook the United States of America and altered the course of history.

The surprise attack by the Imperial Japanese Navy on the U.S. naval base near Honolulu, Hawaii, damaged eight battleships and sunk four, along with many other ships. Nearly 200 aircraft were destroyed and thousands of Americans lost their lives that day.

In the decades following the attack, the U.S. National Parks Service and NOAA have worked to document and preserve the wrecks of Pearl Harbor, including the USS Arizona, which is well known for its memorial.

READ MORE: Unforgettable Wrecks for Scuba Diving and How They Were Sunk

On Wednesday, NOAA is making a special expedition to give people more insight into the history that remains in Pearl Harbor. The public will be able to follow along via livestream as researchers explore two Japanese mini submarines with a remotely operated vehicle. NOAA will launch the ROV from its ship Okeanos Explorer to document the submarines and their current condition. See the video above, or visit NOAA’s site to see the live stream.

Check out this background information on the Japanese submarines, courtesy of NOAA:

“On the morning of December 7, 1941, U.S. naval vessels and aircraft on patrol outside Pearl Harbor spotted a partially-submerged submarine trying to enter the harbor, but alerts were not immediately sent. Ninety minutes before Pearl Harbor was bombed by air, the sub fired on the destroyer USS Ward which then fired back, sinking the sub. The event marks the first U.S. shots fired and the country's entry into World War II in the Pacific.”