The Dutch Records in the archives of the Tamil Nadu government gives details of the many battles in which Nair soldiers participated - on the side of the Zamorin and on the side of the Cochin Maharaja. Dutch general Van Goens tells about the war with the Portuguese and how the Nairs acquitted themselves well in the trenches ‘with fairly good grace in the heat of the tropical day.’
Several British writers, however described the Nair style of fighting as one that lacked discipline. Sir Hector Munro, a Scotsman who was ninth Commander-in-Chief of India, who fought against the Nayars with the Madras Army in 1761 said: "They lurk behind sand banks and bushes, then they appear like bees..they point their guns and fire them well.” The losses were said to have been heavy on the British side and it was recorded that a single Nair soldier killed 5 British Highlanders in a lightning blitz.
Pyrard de Laval, a French navigator, who spent 10 years in southern India in the early 1600s called the Nairs "the best soldiers in the world and exceptionally agile." William Logan, the famous Scottish chronicler, who was collector of Malabar and lived there for 20 years, also mentions that the 'Nayars were excellent in skirmishing" and that they would have had more success had they fought as guerillas.
The image of the raging Nairs was captured well by Christopher Fuller in his book “The Nayars Today”. In the chapter "The Nobles of Malabar", he evocatively wrote about the military role "Honour and Gallantry! Love and battle! My sword and my mistress! These were their devices, and they were ticklish sticklers for the point of honour (as quoted in the Census of 1901, Cochin). "...The great majority of the Nayars probably spent time under arms. The armies were raised by the kings and the chiefs (naduvazhis) and were mostly engaged in fighting each other."
Rao Bahadur G. Gopalan Nair, who was Deputy Collector of Malabar in the 1900s. wrote a book on the Wynad hill tribes, he wrote that the name Kurichiyan was given by the Kottayam Rajas because of their great archery skills. The term used is 'kuri-vechavan - one who aims'). It is suggested that the Kurichiyans belonged to a class of Nairs called Theke Kari Nair from Venad or Travancore and they were brought by the Kottayam Raja to fight the Vedar tribes. After the battles, their kinsfolk did not accept them back and they settled in the hills of Wynad. They apparently still follow Nair traditions in their life, death and other ritual cycles.
Warfare was the chief occupation of the Nairs. For over two thousand years they were able to maintain the integrity and security of their land and culture unlike the rest of India. The only race to have decisively defeated the Nairs are the British. The British colluded with the neo-converts to suppress these inherently rebellious traditional warlords and succeeded... The British Army (not native infantry) performed poorly against the Nair warlords....the Nairs considered it below their dignity to serve under the British and hence most Nair history has been blacked out from Indian records. The toll the Nairs took on the British is much higher than any recorded in India of those times.
The official British policy was to “Break the Nair community to break the backbone of Kerala.” The destruction of the fighting spirit of the Nairs became a political necessity for the British. Kalaripayattu was outlawed in the Malabar kingdoms in 1793. The British, who had earlier registered the Nairs as a martial race, delisted them for rebelling against them in Travancore in 1804 and 1809. The native Travanacore Nair army, comprising 1500 soldiers, was disbanded and the Nairs were forbidden from carrying arms in public. At the same time, other castes in Kerala were recruited in large numbers to become the native infantry for the British.
The titular suffixes of Nair warriors of that period were: Achan, Arimbrar, Chempakaraman, Kaimal, Kurup, Nair, Nambiar, Mannatiar, Manavalar, Menokki, Muttan, Panikkar, Patiar, Perimbrar, Pillai, Tampi, Taravanar. Unnithan and Valiyathan.
By this time, however, the Nairs were already losing their fiefdoms and political power, after being overwhelmed by Marthanda Varma, who ruled Travancore from 1729 to 1758. Marthanda Varma himself began recruiting a foreign force - the Nayakas of Madurai for his army to overrun the smaller kingdoms of southern Kerala.