Hi Sharath!

Below is the chronology for the British establishment over India:

• 1600: East India Company got royal charter for trade
• 1612: First factory established in Surat
• 1639: Madras (Chennai) founded as trading post
• 1757: Battle of Plassey - Robert Clive defeated Nawab, gained Bengal
• 1764: Battle of Buxar - control over Bihar, Bengal, Odisha
• 1765: Got Diwani rights (revenue collection) from Mughal Emperor
• 1798: Wellesley's Subsidiary Alliance policy began
• 1848-56: Dalhousie's Doctrine of Lapse annexed many princely states
• 1857: First War of Independence/Revolt ended Company rule
• 1858: Government of India Act - Crown took direct control via Viceroy

Hope this helps, thank you!