In 1846, he received appointment as the junior preacher of the Dixon, Illinois, Circuit. At first his work centered in southern Illinois, but he quickly expanded, preaching in churches and camp meetings throughout the Midwestern states. He entered United States. Army at Bushnell, Illinois as a Captain in charge of Company F, 55th Illinois Volunteer Infantry Regiment, and was appointed Chaplain of that regiment in March 1862.
Among these four heroes was Milton Haney, sometimes called "The Fighting Chaplain" by the men of the 55th Illinois Infantry.
When the tide of battle was critical on July 22, Chaplain Haney voluntarily joined the ranks of his regiment, as noted in his citation. He mustered out in December of that year.
In the late 1890s, Haney"s chronic health problems worsened, and he began applying for an increase in his military pension. After further correspondence with the "Pension Commissioner" he was awarded an increase.
His pension payments of $60 per month ceased when he died three days short of his 97th birthday.
Haney died at the age of 96 in California on January 20, 1922, after suffering a severe attack of pneumonia. He is buried in Mountain View Cemetery, Altadena, California.
One document in his pension file is a petition drawn up and signed by 21 members of the 55th Regiment, Company F, Illinois Volunteer Infantry, who had served with him and supported his claim for "Invalid Pension." Haney was receiving $30 per month in 1915.