Explanation:

First Anglo Mysore War (1767 – 1769)
Causes
?    Hyder Ali strengthened his army by including French soldiers into his service.
?    In 1755, established modern arsenal in Dindigul with French help.
?    Extended his territories by conquering many areas in South India including Bidnur, Sunda, Sera, Canara, & Malabar to gain access to Indian Ocean.
?    Rapid rise fueled the jealousy of the Marathas, the Nizam of Hyderabad & the English.
Course
?    The Marathas, the Nizam of Hyderabad & the English, formed a triple alliance & declared war on Hyder Ali.
?    By his diplomacy Hyder Ali cleverly won over the Marathas & the Nizam.
?    But under the English General Smith, Hyder Ali was defeated at Changam & Tiruvannamalai in 1767.
?    At the same time Tipu Sultan, son of Hyder Ali advanced towards Madras & the English were forced to enter into an agreement.
Results of First Mysore War
?    Ended with the Treaty of Madras in 1769.
?    Conquered territories during the war were restored to each other.
?    English agreed to help Hyder Ali in case of an attack by his enemies, the Nizam & the Marathas.
Second Anglo Mysore War (1780 – 1784)
Causes
?    Mysore was attacked by the Marathas in 1771. In violation of the Treaty of Madras, the English did not help Hyder Ali.
?    This angered the Ali who wanted an opportunity to strike at the English.
?    When Mahe, a French possession in the dominion of Hyder Ali was attacked by the English, he declared war on the English in 1780.
Course
?    Hyder formed a common front with the Nizam & the Marathas against the English.
?    Hyder Ali defeated Colonel Braithowaite in Arcot & made the English surrender.
?    Luckily for the English, Hyder Ali died in December 1782 & succeeded by his son Tipu Sultan who carried on the war & captured the Fort of Badnur in 1783.
?    Sir Eyre Coote who led the English forces, ended inconclusively with the signing of theTreaty of Mangalore in 1784.
?    Under this treaty both parties agreed to return the conquered land of each other.
Results Second Mysore War
?    Ended with the treaty of Mangalore in 1784.
?    Agreed to exchange the captured territories and war prisoners.
Tipu Sultan
?    Son of Hyder ali.
?    Introduction of a new system of coinage, new scales of weights and measures.
?    Improvisations in the fields of agriculture, trade and commerce.
?    Abandonment of the custom of giving jagirs & reduction in the hereditary possessions of the poligars.
?    Sent missions to France & Constantinople to manage some aid for the state.
?    Training to army on European line; Arming the infantry with rifles.
?    Attempt to establish a navy on modern line for which two dockyards were established.
?    Collection of many books on diverse subjects & setting up a big library.
?    Support to the French soldiers in setting up a Jacobin club in Serinagpatnam in 1797.
?    Grant of funds for the repair of Sringeri Temple and installations of the image of Goddess Sharda.
Third Anglo Mysore War (1786 – 1793)
?    From now English started improving their relationship with the Nizam & the Marathas.
?    Tipu on the other hand improved his resources with the French help.
?    He attacked Travancore in 1789, a friendly state of the English.
?    Lord Cornwallis, Governor General of Bengal declare a war on Tipu in 1790.
?    Ended with the Treaty of Srirangapatnam in 1792.
Results of Third Anglo Mysore War
?    According to treaty Tipu gave half of his kingdom to the English.
?    In which English got Malabar, Coorg, Dindugal and Baramahal.
?    Also compelled to pay a huge war indemnity of over 3 crore rupees & had to surrender two of his sons as sureties to the English until he paid the indemnity.
Fourth Anglo Mysore War (1799)
Causes
?    Treaty of Srirangapatnam failed to bring peace between Tipu Sultan & the British.
?    Tipu refused to accept the subsidiary alliance of Lord Wellesley & instead wanted to take his revenge on the English.
Course
?    Tipu Sent diplomats to Kabul, Constantinople, Arabia & France to get their support in 1799 but none helped.
?    Finally he suffered defeat at the hands of General Stuart & General Harris.
?    Wellesley himself besieged Srirangapatnam & Tipu Sultan died in battle.
Results of fourth Mysore War
?    Tipu’s territories were divided between British & the Nizam of Hyderabad.
?    A Prince of a royal family Wodeyar was installed on the Mysore throne, & the subsidry alliance signed.