Pack Up Your Troubles in Your Old Kit-Bag - British Soldier Song

"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.

The men in the footage are South African volunteers from ww2.