After the Battle of Buxar the British led by Hector Monro decided to support the Maratha Confederacy against the Shah Alam II, the Nawabs and Mysore.

As the power struggle between Mysore and the Peshwa continued it soon began to involve the British and other European mercantile companies.

being himself a former ally of the French, Hyder Ali expected the support of the British against the Marathas, but to no avail.

In 1766 Mysore began to become drawn into territorial and diplomatic disputes between the Nizam of Hyderabad and the British East India Company, which had by then become the dominant European colonial power on the Indian east coast.
The Nizam, seeking to deflect the British from their attempts to gain control of the Northern Circars, made overtures to Hyder Ali to launch an invasion of the Carnatic.
Company representatives also appealed to Hyder Ali, but he rebuffed to them.
The Nizam then ostensibly struck a deal with the British Madras Presidency for their support, but apparently did so with the expectation that when Hyder Ali was prepared for war, the deal with the British would be broken.
This diplomatic manoeuvring resulted in the start of the First Anglo-Mysore War in August 1767 when a company outpost at Changama was attacked by a combined Mysore-Hyderabad army under Hyder Ali's command.
Despite significantly outnumbering the British force (British estimates place the allied army size at 70,000 to the British 7,000), the allies were repulsed with heavy losses.
Hyder Ali moved on to capture Kaveripattinam after two days of siege, while the British commander at Changama, Colonel Joseph Smith, eventually retreated to Tiruvannamalai for supplies and reinforcements.
There Hyder Ali was decisively repulsed on 26 September 1767.
With the onset of the monsoon season, Hyder Ali opted to continue campaigning rather than adopting the usual practice of suspending operations because of the difficult conditions the weather created for armies.
After over-running a few lesser outposts, he besieged Ambur in November 1767, forcing the British to resume campaigning.
The British garrison commander refused large bribes offered by Hyder Ali in exchange for surrender, and the arrival of a relief column in early December forced Hyder Ali to lift the siege.
He retreated northward, covering the movements of the Nizam's forces, but was disheartened when an entire corps of European cavalry deserted to the British.
The failures of this campaign, combined with successful British advances in the Northern Circars and secret negotiations between the British and the Nizam Asaf Jah II, led to a split between Hyder Ali and the Nizam.
The latter withdrew back to Hyderabad and eventually negotiated a new treaty with the British company in 1768.
Hyder Ali, apparently seeking an end to the conflict, made peace overtures to the British, but was rebuffed.

In early 1768, the British Bombay Presidency in Bombay organised an expedition to Mysore's Malabar coast territories.
Hyder Ali's fleet, which the British reported as numbering about ten ships, deserted en masse, apparently because the captains were unhappy with the ouster of their British admirals and some even demanded the return of Ali Raja Kunhi Amsa II, but Hyder Ali chose a cavalry commander Lutf Ali Beg as fleet commander.
Owing to a British deception, Lutf Ali Beg also withdrew much of the Mangalore garrison to move on what he perceived to be the British target, Onore.
The British consequently occupied Mangalore with minimal opposition in February.
This activity, combined with the loss of the Nizam as an ally, prompted Hyder Ali to withdraw from the Carnatic, and move with speed to Malabar.
Dispatching his son Tipu with an advance force, Hyder Ali followed, and eventually re-took Mangalore and the other ports held by the over-extended British forces.
He also levied additional taxes as punishment against local malabari Nair chieftains that had been stripped of rights and authority.

After his reconquest, Hyder Ali learned that the Mangalorean Catholics had helped the British in their conq
After the Battle of Buxar the British led by Hector Monro decided to support the Maratha Confederacy against the Shah Alam II, the Nawabs and Mysore.
As the power struggle between Mysore and the Peshwa continued it soon began to involve the British and other European mercantile companies.
being himself a former ally of the French, Hyder Ali expected the support of the British against the Marathas, but to no avail.
In 1766 Mysore began to become drawn into territorial and diplomatic disputes between the Nizam of Hyderabad and the British East India Company, which had by then become the dominant European colonial power on the Indian east coast. The Nizam, seeking to deflect the British from their attempts to gain control of the Northern Circars, made overtures to Hyder Ali to launch an invasion of the Carnatic. Company representatives also appealed to Hyder Ali, but he rebuffed to them. The Nizam then ostensibly struck a deal with the British Madras Presidency for their support, but apparently did so with the expectation that when Hyder Ali was prepared for war, the deal with the British would be broken. This diplomatic manoeuvring resulted in the start of the First Anglo-Mysore War in August 1767 when a company outpost at Changama was attacked by a combined Mysore-Hyderabad army under Hyder Ali's command. Despite significantly outnumbering the British force (British estimates place the allied army size at 70,000 to the British 7,000), the allies were repulsed with heavy losses. Hyder Ali moved on to capture Kaveripattinam after two days of siege, while the British commander at Changama, Colonel Joseph Smith, eventually retreated to Tiruvannamalai for supplies and reinforcements. There Hyder Ali was decisively repulsed on 26 September 1767. With the onset of the monsoon season, Hyder Ali opted to continue campaigning rather than adopting the usual practice of suspending operations because of the difficult conditions the weather created for armies. After over-running a few lesser outposts, he besieged Ambur in November 1767, forcing the British to resume campaigning. The British garrison commander refused large bribes offered by Hyder Ali in exchange for surrender, and the arrival of a relief column in early December forced Hyder Ali to lift the siege. He retreated northward, covering the movements of the Nizam's forces, but was disheartened when an entire corps of European cavalry deserted to the British. The failures of this campaign, combined with successful British advances in the Northern Circars and secret negotiations between the British and the Nizam Asaf Jah II, led to a split between Hyder Ali and the Nizam. The latter withdrew back to Hyderabad and eventually negotiated a new treaty with the British company in 1768. Hyder Ali, apparently seeking an end to the conflict, made peace overtures to the British, but was rebuffed.
In early 1768, the British Bombay Presidency in Bombay organised an expedition to Mysore's Malabar coast territories. Hyder Ali's fleet, which the British reported as numbering about ten ships, deserted en masse, apparently because the captains were unhappy with the ouster of their British admirals and some even demanded the return of Ali Raja Kunhi Amsa II, but Hyder Ali chose a cavalry commander Lutf Ali Beg as fleet commander. Owing to a British deception, Lutf Ali Beg also withdrew much of the Mangalore garrison to move on what he perceived to be the British target, Onore. The British consequently occupied Mangalore with minimal opposition in February. This activity, combined with the loss of the Nizam as an ally, prompted Hyder Ali to withdraw from the Carnatic, and move with speed to Malabar. Dispatching his son Tipu with an advance force, Hyder Ali followed, and eventually re-took Mangalore and the other ports held by the over-extended British forces. He also levied additional taxes as punishment against local malabari Nair chieftains that had been stripped of rights and authority.
After his reconquest, Hyder Ali learned that the Mangalorean Catholics had helped the British in their conq
Hyder Ali