The song was introduced in 1939 and was popular in the UK during WWII. A British movie with the same name, “I’ll Walk Beside You“, came out in 1943 and featured the song. The movie was moderately successful rating 5.2/10 on IMDB.
If you are interested in the WWII era of history, you may find these three pages of interest.
The “World War II Sources” page is a constantly growing collection of more than 320 links to museums, memorials, websites, Facebook pages, Twitter feeds and other sources with information on the World War II era in history.
The “World War II Timeline” page expands almost daily and shows events leading up to WWII, as well as during the war. Events are broken down into the Pacific and European Theaters by date.
The “About WWII” page is a collection of links to posts that I have made over the years that are relevant to WWII.