This summary from John Patterson gives us an excellent description of the many activities the Delegates engaged in to encourage the troops. He was involved with the White House Christian Commission Station during June 1862, just before the retreat of the Eastern Army from the Peninsula:
One day, the quiet was disturbed by the thunder of distant cannon. Soon after stragglers from the front came in; than a battery of field artillery which had desolated the path of the advancing enemy. Then came the order to break up the hospital as soon as possible, which was interpreted to us to mean twelve hours. That evening, all who could walk or hobble to our tents were there. We distributed our entire remaining stock. Farewell addresses, delivered by two of us, were answered by the hearty cheers of our audience, and the whole was concluded with a hymn.
Such benevolence was repeated over and over in different locations and situations by the Delegates who volunteered their lives to minister to the soldiers far from home. It is important to note how they blended spiritual help in with the practical help generously given. They provided for the physical needs of the soldiers. They engaged the soldiers personally and in group settings. They pointed them to the truth of the Gospel of Jesus Christ. These Delegates took seriously Jesus' words that the righteous show their faith through compassion, even to the least of the brethren (Matt.25:31-46).
The Christian Commission understood that our soldiers needed more than weapons and uniforms. They needed compassionate encouragement to face the trials of war. And they needed the eternal truth of the Gospel.