Wood millworkers in the UK and Ireland are among the first to tell their stories of Biggest day, which began on the morning of November 6, 1914, and lasted until the morning hours of the following morning.
“I remember I was at work and saw all the wood coming out of the mill and the lights coming on in the shed,” said Michael Jones, who was a wood worker in the Wicklow area.
“[My boss] told me I was supposed to go to bed before it started and I just stood there for like 20 minutes waiting for the lights to come on.”
“We just got the lights and I was just in the darkness and everything else, waiting,” he added.
A total of 1,843 men and women died in the Battle of Britain and the Great War, according to the National Archives.
But Mr Jones said he felt like he was part of the battle, “because it was such a big moment for the people in my area”.
“It was the biggest day of our lives and it was a day where everything changed for the better, for the country and for the British people,” he said.
Mr Jones said the battle of Britain was a turning point for the whole country.
The day after the Battle was marked by a huge procession of soldiers to Westminster Abbey and the Queen Elizabeth II was crowned Queen of the United Kingdom.
On the other side of the country, soldiers from the Scottish Regiment of the Light Horse were still marching through Stirling Castle to the Parliament building.
They were joined by British Army soldiers, with many of the parades lasting until the wee hours of November 10.
“I thought it was amazing because there was a real sense of pride and patriotism in the air,” Mr Jones told ABC Radio Perth.
He said he thought the Queen had been honoured and “was honoured” by the crowd.
During the day, Mr Jones worked in the sheds of wood millworks and he remembered the soldiers as “like a family”.
The National Archives said that by the end of the day on November 6th, there were 4,800 men and 5,000 women in the workforce of 1.2 million, of which 1.6 million were male.
It said: “A total population of approximately 3.3 million, representing a proportion of approximately 16 per cent of the workforce.
There were 1,400,000 square metres of work space in the working day.”
In the UK, a total of 2.4 million people were employed in the milling industry.
Wood millwork is a major industry in Ireland, which is also home to 1.3 per cent or 3,200 woodworkers.
Some Irish men in particular had been in the industry for decades and said it had changed their lives.
“We grew up on wood and I thought that it was going to be like my childhood and I had a dream of becoming a millworker,” said Jimmy O’Connor.
While Mr O’Conner said he was “fearful” of going to work in the new mill, he said it would be a “great opportunity” to “have fun”.
“I would love to be able to go and see the old mill, I would love a job like the one we have now, and I think that would be so cool,” he told ABC Perth.