George Washington and the Continental Army used three roads in South Brunswick Township (aka—South Ward) while making their way to the Battle of Monmouth. They arrived in Kingston on June 24, 1778, by using a short stretch of Route 27 (aka—The King’s Highway or The Upper Road).
The next day, leaving their tents behind and traveling light, they marched along Ridge Road, which was the drier route to Cranbury. They spent the night at Long Bridge farm. On the morning of the 26th, American forces of more than six thousand continued along Ridge Road until they reached Cross Roads (aka—Dayton), where they turned southeast onto Georges Road and made it to Cranbury late in the day.
The following day, they headed towards Englishtown and Freehold. On June 28th, the Americans faced the British in the Battle of Monmouth.
Resource: Section of: 1778 The Province of New Jersey, divided into East and West, commonly called the Jerseys [map]. Engraved & published by Wm. Faden. https://catalog.princeton.edu/catalog/9955758113506421#viewer-container.