The emblem of Kent is a rampant white horse on a red background with the motto "Invicta". Invicta means unconquered or untamed and refers to the county's history of keeping it's borders - and liberty - since before the Romans came. In particular, whilst it is known that William the Conqueror successfully invaded England in 1066, it is generally less well-known that he had tried the year before, via Romney in Kent. He was beaten off by locals that time and presumably had something to prove against the people of Kent.

Even after his coronation, Kent continued to be a thorn in his side. He took an armay there to quell the insurgents but was met by local leaders at Swanscombe in a wooded clearing. Not knowing how large the hidden Kentish army was, he decided that negotiation was preferable and allowed Kent to enjoy special rights and liberties conferred on the county by Edward the Confessor.

As to the history behind "Men (or Maids) of Kent", for those born east of the Medway and "Kentish Men/Maids" who are born on the west side, this dates back even further. Saxon mercenaries had been hired to defend Kent from invaders in about 449AD and were given the Isle of Thanet (then still an actual island) as a reward. Mercenaries being, well, mercenary, decided to invade the mainland themselves and overthrow their former employers.

More Saxons arrived, from different homelands, and settled in the north-west part of the county. It was then that the Men of Kent/Kentish Men boundary was formed, with the river Meday providing a natural boundary. It is thus that "Men of Kent" are descended from the Angles, Whilst the "Kentish Men" were formerly Saxons. As time passed, the Angles became more dominant, driving the Celts westward and forming the English Nation.