The Artilleryman is a soldier who tries to enter the Narrator's house after his squadron was wiped out by the martians on Horsell Common. They leave together but get separated by a Martian attack at Weybridge. He survived the Marian attack by climbing up a storm drain.
later on in the book we find the Artilleryman in Wimbledon, London. He has gone slightly mad and thinks London can be rebuilt in the drains below. He believes the Martians will turn the humans against each other. The Narrator goes along with his plans until he realises that it is crazy and then leaves the Artilleryman to his own devices.
He also appears in Jeff Wayne's Musical Version of The War of the Worlds where his part is sung by David Essex in the song 'Brave New World' and later in Live on Stage, the Artilleryman is portrayed by Alexis James, Michael Falzon, and Jason Donovan in the 2010 version. In The New Generation, the Artilleryman is Voiced and Sung by Ricky Wilson in Album and Live on Stage. In the 2018 tour for the 40th anniversary of the musical, the Artilleryman is portrayed by Adam Garcia.