Image caption Illustrated London News picture from 1913, showing Wells measuring a move with string

It is a century since HG Wells published the first proper set of rules for hobby war games. There's a hardcore of gamers who are still playing in his style.

Pine tips are stuck in the grass to represent trees. Roads are laid out with trails of compost.

This is the Battle of Gettysburg, with Union soldiers on one side and Confederates on the other. But the soldiers of this new Gettysburg are 54mm (2in) tall and mostly made of plastic.

The battle is taking place between a group of enthusiasts in a garden at Sandhurst military academy under rules derived from Little Wars, devised by HG Wells in 1913.

War was then looming in Europe and Little Wars was both an expression of Wells's passion for toy soldiers and to his fears over the coming slaughter. The science fiction author even believed that war games could change attitudes.

"You only have to play at Little Wars three or four times to realise just what a blundering thing Great War must be," wrote Wells.

Herbert George Wells, 1866-1946 Made his name with science fiction classics like The Time Machine and War of the Worlds

Predicted tanks in 1903, atomic bombs in 1914 and WWII (to within four months) in 1933

Had two sons with his second wife and two children from a succession of relationships outside marriage

As well as war gaming, roped his guests in for boisterous hockey and handball games where he made up the rules

Sandhurst chaplain Paul Wright has updated Wells's rules - retitled Funny Little Wars - and says about 100 people in the UK still play it. A veteran of Iraq and Afghanistan, Wright has been war gaming since he was a child.

"As an army chaplain, having buried a lot of people and had friends of mine killed, I'd hate to think I was trivialising war but I don't think I am," he says.

For a lot of people, says Brian Carrick, one of the Union "generals" at the Sandhurst recreation, the fun of war gaming is "about the rules and recreating history and experiencing command in a battle - but for me it's simply about playing with my soldiers. I collect them, I paint them, I enjoy them and this gives me something to do with them."

The actual firing of miniature artillery pieces is at the heart of the Wells school of war gaming.

A Funny Little Wars game sees rival commanders bombard their adversaries with matchsticks, fired with little spring-loaded triggers in the tiny cannons. Careful measurements from where the matches land decide the number of victims.

This is looked on with disapproval by some modern war gamers, who prefer theoretical bombardments worked out with distance tables.

Phil Barker, a celebrated deviser of modern games, acknowledges Wells's role in "showing it could be done - and giving grown men an excuse to play with toy soldiers".

But he adds: "Combat was based on shooting solid projectiles at the figures. Today, this would be discouraged because of the risk of someone getting a projectile in the eye, but it was the chance of damage to the finish of lovingly home-painted figures that led to the switch to less lethal dice."

Image caption Collectors take great pride in their soldiers' detailing. So much so that some war gamers treat them "like their wife's jewellery"

Image caption HG Wells's lead soldiers and cannons are still in the possession of his family

Image caption HG Wells's soldiers are hollow-cast lead and break very easily, says Prof Dominic Wells

Image caption "We have an awful lot of horses without tails and soldiers missing one arm and so on," says the writer's great-grandson

Image caption Gettysburg 2013, looking south

Image caption The war game moves require great concentration - and constant consultation of the rules

Image caption Artillery is central to the Wells-style game. The "smoke" is cotton wool. The matchboxes contain the allocated rounds for each gun