The Lilliput Legion by Simon Hawke

Miniature people, approximately six inches in height.... In 18th century London, Dr. Lemuel Gulliver's tale of encountering little people after being shipwrecked on an island are dismissed as the drunken ravings of a madman by everyone save the eccentric author, Jonathan Swift, and an observer from the Temporal Intelligence Agency, who is alarmed by Gulliver's description of their weapons. The obviously traumatized surgeon has accurately described miniaturized versions of military ordnance that will not exist for over a thousand years. "Dr. Gulliver described, in great detail, some of the weapons used by these little people, or 'lilliputians', as his companion, Mr. Swift, referred to them," the TIA observer wrote in his report. "From the lucid description of these miniature weapons and their function, they were unquestionably miniature lasers and autopulsers. From the description of their uniforms and tactics, these so-called 'lilliputians' sounded exactly like modern commandos, only on an incredible, miniature scale." Killed before he could finish his report, the agent's last act was to transport Dr. Gulliver to the 27th century, where the astonished surgeon was confronted with the wonders of the future, and the Time Commandos were confronted with a new and highly dangerous threat - an army of bioengineered hominoids from a parallel universe, no more than six or seven inches tall, armed with lasers, plasma weapons, and jet packs ...and the ability to travel through time.

This book is part of the "TimeWars" series.
Here are some other books from this series: