From the Halifax Courier, 5th June 1915.
Text: SAFEGUARDS. Just as the Navy is the Nation's safeguard, so is Lifebuoy Soap the safeguard of health. By reason of its wonderful antiseptic properties combined with its free cleansing lather, Lifebuoy Soap safeguards health every time it is used.
MORE THAN SOAP - YET COSTS NO MORE.
[I remember Lifebuoy soap from the 1950s. It was a pinky-red colour and smelt of carbolic acid, which gave the antiseptic properties. It is still made by Unilever, according to the Wikipedia article.
Many ads of the time promoted goods that would be useful to troops in the field, and by extension to the people at home - this is a different approach, in which the armed forces protecting the country are a metaphor for antiseptic protecting the body.]