Following this he was commissioned into the Royal Engineers and posted to the 26th Field Company.

On the first day, the 2/7th Field Company lifted fourteen mines but a tractor broke a track running over a mine.

Stone was a lieutenant serving with 274 Field Company Royal Engineers.

The engineers corps started the war with two army troops companies, 11 Field Companies and one field park company.

There was already another 5th Field Company in Egypt, which had been raised in Australia.

It was built by the 250th Field Company of Royal Engineers.

Meanwhile, 406 Field Company extended the operational track beyond Tarakwal.

After training he was sent to the 2/8th Field Company in North Africa as a reinforcement.

He went overseas during the Second World War with 16th Field Company.

The task of clearing the beach obstacles at Lingkas was assigned to the 2/13th Field Company.