Most people are aware of the Salvation Army but usually with shallow knowledge. They are the people who receive donations in kettles at Christmas and run soup kitchens.
I remember the first time I realized that the Salvation Army was a church. I had thought it was as Christian as the YMCA.
William Booth was the founder of the Salvation Army and it is firmly founded in Christian faith. In this short video, you can hear the actual voice of William Booth. Even though this sermon is over a hundred years old, it is still quite timely.