Mississippi and US Navy Corps officials devoted a memorial to the 15 Marines and a US Navy Corpsman who died in a crash last year.
Hundreds of relatives and friends of the 16 victims gathered for the Mississippi Valley State University ceremonies and the nearby memorial reported Greenwood Commonwealth.
"All we want to do is talk about them and share who they were with the rest of the world," says Anna Johnson, widow of Gunnery Sgt. Brendan Johnson, a crew member, reported Jackson Clarion Ledger.
Special forces Marines aboard the KC-130T military transport plane went from North Carolina to California for training when it crashed July 10, 2017.
The aircraft flew by a New York-based Marine Reserve unit and known by Yanky 72's phone call.  After the service, the crowd was driven by buses to see the unveiling of the nearby memorial, which shows a picture of a granite KC-130T planet and surrounded by a circle of the engraved names of those cases.
"Your loss has become our loss," told Mississippi Gov. Phil Bryant those who had come from as far away as Ireland for the ceremony.
"We are grateful for the whole memorial, and we will never ever forget them," said Cindy Elliott of the victims. She lost her son, 30-year-old Capt. Sean E. Elliott, Orange, California.
Elliot said that surveillance helped the family find closure after her son's death.
Deneen Hopkins Wiske, a Wisconsin firefighter, is the sister of the fall Gunnery Sgt. Mark Hopkins.
"We were very lulled into a false sense of security with Mark and what he did, "she said." These are the skies of the animal; they fail. "
Nate Harris, a special Marine Operational Command, told Clarion Ledger that" We know it's the right thing to do to honor them. "
" I can not imagine a plan filled with 16 better people, "says Wiske. "They remind us of the best we have to offer and they really led their lives by getting the most out of every day."
No reason for the crash has been released as the investigation continues.
Associated Press contributed to this report.