The Amount of People in Revolutionary War

There were a significant amount of British soldiers in the Revolutionary War. At one point, there were 50,000 British soldiers in battle at one time. That is a huge amount for 18th century battle. At first the British had 25,000 Hessians(German hired soldiers) and 5,000 Americans(presumably Loyalists) fighting for them. 50 redcoats held off 3,000 rebels for a few days until the Royal Navy arrived. From all of these facts, I can deduce that this war meant a lot to the British. I wouldn't send out 50,000 soldiers at once for nothing. Clearly, the British really wanted this war to be theirs. The British were willing to send out a huge amount of people when they were fully aware that a great sum of them would not return. I would not risk countless lives unless I extremely needed the war.