Solution:Battle of Ambur:- It was fought on 3rd August 1749, and it was the part of the Second Carnatic War. This battle was against Anwaruddin Muhammed Khan, the Nawab of Carnatic. This battle had proved the superiority of European arms (French). After this battle, Chanda Sahib was declared as Nawab of Carnatic.
Battle of Plassey:- It was fought on 23rd June 1757, near Murshidabad in the battlefield of Plassey. In this battle, Siraj-ud-Daula was defeated by the British forces.
Battle of Wandiwash:- It was fought on 22nd Jan 1760 and is part of the Seven Years War(3rd Carnatic War) fought between two European forces i.e. French and British. French forces were defeated in this battle.
Battle of Buxar:- It was a decisive battle which was fought on 22nd Oct 1764 in the battlefield of Buxar. In this conflict British forces were led by Major Hector Munro, who maintained the discipline and coordination and defeated Indian powers led by Shah Alam-II. After this battle Treaty of Allahabad was signed with Mughal emperor Shah Alam-II.