The 27th Regiment, 2nd Battalion (USMC), lands on Iwo Jima. - The 27th Regiment, 2nd Battalion (USMC), lands on Iwo Jima. (Photo by Bob Campbell, National Archives Identifier 148727708) // 230223-M-CG311-001

An unidentified WWII veteran places his hand on the names of the Connecticut fallen at the National Iwo Jima Memorial in New Britain CT.(Courtesy Photo) - An unidentified WWII veteran places his hand on the names of the Connecticut fallen at the National Iwo Jima Memorial in New Britain CT.(Courtesy Photo)

U.S. Marines raise the flag atop Mount Suribachi, Iwo Jima, Feb. 23, 1945. - U.S. Marines raise the flag atop Mount Suribachi, Iwo Jima, Feb. 23, 1945.

From left to right, U.S. Marine Corps Gunnery Sgt. William L. Koeppe, career planner, Staff Sgt. Nils A. Aylor II, motor vehicle operator, U.S. Navy Hospitalman third class Josh A. Johnson, 8th Marine Regiment, lay wreaths during the 35th Beirut Memorial Observance Ceremony at the Lejeune Memorial Gardens in Jacksonville, N.C., Oct. 23, 2018. A memorial observance is held on Oct. 23 of each year to remember those lives lost during the terrorist attacks at U.S. Marine Barracks, Beirut, Lebanon and Grenada. - From left to right, U.S. Marine Corps Gunnery Sgt. William L. Koeppe, career planner, Staff Sgt. Nils A. Aylor II, motor vehicle operator, U.S. Navy Hospitalman third class Josh A. Johnson, 8th Marine Regiment, lay wreaths during the 35th Beirut Memorial Observance Ceremony at the Lejeune Memorial Gardens in Jacksonville, N.C., Oct. 23, 2018. A memorial observance is held on Oct. 23 of each year to remember those lives lost during the terrorist attacks at U.S. Marine Barracks, Beirut, Lebanon and Grenada.

Brig. Gen. Bradley S. James, commanding general of 4th Marine Aircraft Wing, reads a letter written by Gen. Robert B. Neller, Commandant of the Marine Corps, addressing retired Chief Warrant Officer 4 Hershel “Woody” Williams, the last surviving Medal of Honor recipient from the Battle of Iwo Jima, for his 95th birthday at the National World War II Museum, Oct. 2, 2018. Part of the letter stated, “This is a remarkable milestone and I hope it will offer you the opportunity to reflect on a lifetime of achievements.” (U.S. Marine Corps photo by Lance Cpl Tessa D. Watts) - Brig. Gen. Bradley S. James, commanding general of 4th Marine Aircraft Wing, reads a letter written by Gen. Robert B. Neller, Commandant of the Marine Corps, addressing retired Chief Warrant Officer 4 Hershel “Woody” Williams, the last surviving Medal of Honor recipient from the Battle of Iwo Jima, for his 95th birthday at the National World War II Museum, Oct. 2, 2018. Part of the letter stated, “This is a remarkable milestone and I hope it will offer you the opportunity to reflect on a lifetime of achievements.” (U.S. Marine Corps photo by Lance Cpl Tessa D. Watts)

Multiple squadrons participated in the professional military education on the island to gain information on its historical significance and foster esprit de corps. - U.S. Marines from Marine Corps Air Station (MCAS) Iwakuni, collect sand at Iwo To (Iwo Jima), Japan, Nov. 7, 2017. Multiple squadrons participated in the professional military education on the island to gain information on its historical significance and foster esprit de corps.

Iwo Jima veteran Francis Jackson participates in the 72nd Reunion of Honor commemorative service on Iwo To, Japan March 25, 2017. Jackson was one of eight veterans in attendance alongside American and Japanese distinguished guests, both military and civilian. This event presented the opportunity for the U.S. and Japanese people to mutually remember and honor thousands of service members who fought and died on the hallowed grounds of Iwo Jima. - Iwo Jima veteran Francis Jackson participates in the 72nd Reunion of Honor commemorative service on Iwo To, Japan March 25, 2017. Jackson was one of eight veterans in attendance alongside American and Japanese distinguished guests, both military and civilian. This event presented the opportunity for the U.S. and Japanese people to mutually remember and honor thousands of service members who fought and died on the hallowed grounds of Iwo Jima.

The U.S. Marine Corps has concluded that a previously unknown Marine is in the iconic flag raising image taken atop Mt. Suribachi during the battle of Iwo Jima in 1945. - The U.S. Marine Corps has concluded that a previously unknown Marine is in the iconic flag raising image taken atop Mt. Suribachi during the battle of Iwo Jima in 1945.

James "Jim" Krodel, a Marine veteran and survivor of the battle for Iwo Jima from Quitman, Texas, poses for a photo during the Iwo Jima Battle Survivors and Family Association 70th anniversary reunion at Wichita Falls, Texas, February 14, 2015. Krodel served in the Marines 1944-1946. - James "Jim" Krodel, a Marine veteran and survivor of the battle for Iwo Jima from Quitman, Texas, poses for a photo during the Iwo Jima Battle Survivors and Family Association 70th anniversary reunion at Wichita Falls, Texas, February 14, 2015. Krodel served in the Marines 1944-1946.

Raymond Lueb, Marine survivor from the battle of Iwo Jima, poses for a photo during the Iwo Jima Battle Survivors and Family Association 70th anniversary reunion at Wichita Falls, Texas, February 14, 2015. Lueb served in the Marine Corps from January 1944 until May 1946. - Raymond Lueb, Marine survivor from the battle of Iwo Jima, poses for a photo during the Iwo Jima Battle Survivors and Family Association 70th anniversary reunion at Wichita Falls, Texas, February 14, 2015. Lueb served in the Marine Corps from January 1944 until May 1946.

Marshall Harris, Marine survivor from the battle of Iwo Jima, poses for a photo during the Iwo Jima Battle Survivors and Family Association 70th anniversary reunion at Wichita Falls, Texas, February 14, 2015. Harris served with 2nd Armored Amphibian Tank Battalion during World War II. - Marshall Harris, Marine survivor from the battle of Iwo Jima, poses for a photo during the Iwo Jima Battle Survivors and Family Association 70th anniversary reunion at Wichita Falls, Texas, February 14, 2015. Harris served with 2nd Armored Amphibian Tank Battalion during World War II.

Members of the Marine Corps Historical Company present an Iwo Jima Flag Raising Tableau during the Iwo Jima Commemorative Banquet for the 70th Anniversary of the Battle of Iwo Jima at Marine Corps Base Camp Pendleton, Calif., March 7. The evening included a sunset memorial, 21-gun salute, banquet and a video message for veterans from Commandant of the Marine Corps General Joseph Dunford. “Your legacy is the young men and women who use your example of courage and commitment to inspire them to confront and overcome the challenges that they face today … I pledge that today’s Marines will keep the spirit of Iwo Jima alive,” said Dunford. - Members of the Marine Corps Historical Company present an Iwo Jima Flag Raising Tableau during the Iwo Jima Commemorative Banquet for the 70th Anniversary of the Battle of Iwo Jima at Marine Corps Base Camp Pendleton, Calif., March 7. The evening included a sunset memorial, 21-gun salute, banquet and a video message for veterans from Commandant of the Marine Corps General Joseph Dunford. “Your legacy is the young men and women who use your example of courage and commitment to inspire them to confront and overcome the challenges that they face today … I pledge that today’s Marines will keep the spirit of Iwo Jima alive,” said Dunford.

William "Bill" Schott, a Marine veteran and survivor from the battle of Iwo Jima, poses for a photo at the Iwo Jima Battle Survivors and Family Association 70th anniversary reunion in Wichita Falls, Texas, February 14, 2015. Schott served in the Marine Corps from 1943 to 1947. - William "Bill" Schott, a Marine veteran and survivor from the battle of Iwo Jima, poses for a photo at the Iwo Jima Battle Survivors and Family Association 70th anniversary reunion in Wichita Falls, Texas, February 14, 2015. Schott served in the Marine Corps from 1943 to 1947.