It was fought on day six of the 1902 Invasion.
The Martians in able to complete the invasion they foreys from London to destroy area's in Essex, and one of these Martians happened upon a battery of cannon at the Waltham Abbey Powder Mills. The cannoners decided to take advantage of the lone Martian before it was reinforced by others.
As soon as they open fired the Martian Tripod fired its Heat-Ray and, after a short gunfight, the Mills were burned down and the Tripod suffered minor damage.
The Tripod retreated to London were it was repaired. Meanwhile three of its companions continued to try to prevent a mass escape to France by the Royal Navy.