What song, popular in the first world war, was written by george and felix powell?

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

Explanation:

Its 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.

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.