Check the listing for details. Civil War US Pattern 1858 Forage Cap - Size Extra Small. Condition: New. Listed at 19.00 USD. Civil War US Army Forage Cap - Pattern 1858 - Size Extra Small. Patterned after French and Austrian headgear, the Forage Cap was adopted by the US Army in 1858. Veteran Arms LLC's Pattern 1858 Forage Cap is made of high quality dark blue wool with cotton lining and leather sweatband.