12/07/1863
https://www.presidency.ucsb.edu...
"Volunteers will be accepted under this call for one, two, or three years, as they may elect, and will be entitled to the bounty provided by the law for the period of service for which they enlist."
"I, Abraham Lincoln, President of the United States, do issue this my call for 500,000 volunteers for the military service"
"I do hereby further invite and request the heads of the Executive Departments of this Government, together with all legislators, all judges and magistrates, and all other persons exercising authority ..."
"I do hereby appoint the first Thursday of August next to be observed by the people of the United States as a day of national humiliation and prayer."