Step 1: Background of the revolt.
The revolt of 1857, also known as the First War of Independence, began due to discontent among Indian soldiers (sepoys) in the British army.
Step 2: Place of beginning.
On 10th May 1857, sepoys at Meerut rebelled against the British officers after being punished for refusing to use greased cartridges. This mutiny quickly spread to Delhi and then across North India.
Step 3: Conclusion.
Hence, the revolt began at Meerut on 10th May 1857.
\[
\boxed{\text{Meerut}}
\]