Now, only three of the original members of that unit survive. Campbell said it was important to honor their sacrifice.

"There is no other part of this country that served at such a great rate, we owe an extraordinary debt of gratitude and acknowledgment to these men and what they gave for their country," he said during the event held on Thursday Island in the Torres Strait on March 17 this year.

Australia's forgotten 'diggers'

Every April 25, Australia commemorates the sacrifices of its military servicemen and women on Anzac Day, including the Indigenous Australians who have fought in every conflict since the Boer War.

Originally created to honor the members of the Australian and New Zealand Army Corps (ANZAC) who fought during the doomed Gallipoli campaign in World War I, it has become a day of remembrance for all Australian troops, or "diggers" as they are known.

Australia's "black diggers," or Aboriginal and Torres Strait Islander soldiers, fought the same wars but not for the same privileges.

After lobbying in the 1980s, members of the battalion were repaid their outstanding earnings from decades earlier, according to local politician Warren Entsch. In 2001, they finally received service medals.

"As a nation we haven't always shown respect to our First Peoples, but we are getting better," said Darren Chester, Minister for Veterans Affairs during the March event on Thursday Island.

"We need to share your stories. It concerns me greatly that as a young student growing up that I had no idea of this battalion," he said.

Torres Strait vs Japan

On March 14, 1942, the Torres Strait was thrust into the war after Japan carried out a bombing raid on Horn Island, a speck of land just off the northern tip of the Australian mainland.

Local historian Vanessa Seekee, who has studied the battalion's history, said Horn Island was the base for Australia's most northerly airstrip, which was vital for the Allied forces in the Asia Pacific theater.

"Horn Island was bombed eight times between 1942 and 1943, making it the second most attacked Australian territory during the war," she said.

There were dogfights between Japanese Zeros and Australian Kittyhawks in the skies above the Torres Strait during WWII, and Japanese submarines lurked in its seas.

All this created the impetus for the men of the Torres Strait to enlist to fight for their homes.

The TSLIB were first trained as infantrymen, but the Australian army soon realized the versatility of the 'Island Diggers,' and they soon also took on the roles of shipwrights, boot makers, carpenters, plumbers, signalers and gunners.

"We did night time maneuvers, scout, messenger, break away man, learn how to bayonet dummies, really good training that time for one year, then we were transferred to Hammond Island," Mebai Warusam, one of the last surviving members, told CNN.

Warusam, who is now in his 90s and lives at home in Saibai, in the northerly reaches of Australia's Torres Strait territory, said his memories of the war are slowly slipping away.

"Some things I remember, but memory starting to go now," he said.

But one thing Warusam does remember is how difficult losing almost every able-bodied man in the Torres Strait was for the island chain's women.

Fred Gela, son of Lance Corporal Solomon Gela, one of the first men to sign up for the battalion, said the sacrifice of the Torres Strait women should be remembered as well.

"When we pay tribute to these men we must also pay tribute to all women, all mothers because at that time, their strength, their unity and their leadership," he said. "They selflessly made that commitment."

Sarpeye

The memory of the war endures in the Torres Strait, some 70 years after peace was declared and the men of the islands were allowed to return home.

A group of traditional island dancers still perform the Airplane dance, Seekee said, after it was first staged in 1944 for Australian Army General Thomas Blamey to commemorate the bombing of Horn Island.

"Dancing is a way to pass down stories, to ensure future generations know the contribution of the Torres Strait Islanders in WWII," she said.

Some of the dancers representing the Japanese Zeros squat, acting out the low-flying fighter planes. Those depicting the high-flying bombers stand at the back.

On the morning of the unit's 75th anniversary commemoration, the Australian army's Campbell formally renamed the barracks the Sarpeye Barracks.

"Sarpeye... is a local shortening of the expression 'sharp eyes,'" he said. "The [TSLIB] company are known and have been known for decades, since the war, for being the members undertaking surveillance and reconnaissance with sharp eyes and sharp ears."

Campbell said the regiment took strength from the traditional owners of the land, who had lived on the Torres Strait for generations. "We [all] serve one purpose, defense of this great country," he said.