Story highlights Part of the proceeds will benefit the Fisher House Foundation

That means it's the second time the document will be sold to benefit soldiers

(CNN) This Memorial Day, historical collectors have the opportunity to snag a rare Civil War item: a document believed to be the only one with the signatures of President Abraham Lincoln and his fellow Union political and military leaders.

The document is from 1861 and bears the signatures of Lincoln and other Union leaders, according to the Raab Collection, which is putting it up for sale on Memorial Day. The Raab Collection discovers, curates and sells historical items like this one.

Lincoln, the members of his cabinet and Union army leaders signed the document -- now valued at $150,000 -- so it could be sold for the benefit of The United States Sanitary Commission, a privately funded agency responsible for raising money to support sick and wounded Union soldiers.

Despite being an arm of the War Department and Medical Bureau, the sanitary commission received no federal funding. It was fairly new at the time, according to the Raab Collection, and looking for seed money.

Other notable signatories include Brig. Gen. Robert Anderson -- who commanded the Union garrison at Fort Sumter, the South Carolina fort where the Civil War began -- and Lincoln's secretary of state, William H. Seward.

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