Pack Up Your Troubles in Your Old Kit-Bag, and Smile, Smile, Smile

"Pack Up Your Troubles in Your Old Kit-Bag, and Smile, Smile, Smile" is the full name of a World War I marching song, published in 1915 in London. It was written by Welsh songwriter George Henry Powell under the pseudonym of "George Asaf", and set to music by his brother Felix Powell.

Note that the "lucifer" (the biblical bringer of light) is used to refer to a match while "fag" is the British name for a cigarette

The song was recorded by Spike Jones & his City Slickers in 1942. It was also recorded by: The Andrews Sisters; Bob Crosby & his Orch.; Lew Davies; Red Foley; Victoria Jackson; and Jack Lemmon.