"That's a Mother's Liberty Loan" is a World War I era song released in 1917.

On the cover is a vitagraph photo of actors Edward Earle (in uniform) and Mary Maurice facing one another.

[4] The sheet music can be found at Pritzker Military Museum & Library.

[6] In fact, giving up one's son was viewed as an "investment" in the country's future.

The chorus is as follows: [2] I gave my boy to Uncle Sam To fight for you and me, Just like his dad at Gettysburg In Eighteen Sixty-Three If life must pay for liberty, I'm giving all I own, And when the battle's won I'll then take back my son.