Final answer:
General Sir Henry Clinton was the main General on the British side in the Siege of Charleston.
Step-by-step explanation:
The main General on the British side in the Siege of Charleston was General Sir Henry Clinton. In April 1780, General Clinton commanded a force of 13,500 British soldiers who laid siege to Charleston. After six weeks, the British triumphed and General Benjamin Lincoln, who led the American forces, was forced to surrender. General Clinton established a military government in Charleston and ordered General Charles Cornwallis to subdue the rest of South Carolina.