25th Royal Fusiliers (Legion of Frontiersmen) was one of two British Army units to serve in Africa during the First World War. The others were Indian Army and Colonial forces. The other British unit was the 2nd Loyal North Lancashire Regiment who at the outbreak of war was serving in India. It arrived in East Africa as part of Indian Expeditionary Force C in 1914.
The Old and the Bold
http://www.25throyalfusiliers.co.uk/welcome.html
Daniel P Driscoll, commanding officer of the 25th Royal Fusiliers (Legion of Frontiersmen) – Ancestors of Nigel (O’Neil) Driscoll:
http://www.nigeldriscoll.com.au/24.htm
Countess Mountbatten’s Own Legion of Frontiersmen (the organisation today)
http://cmolegionoffrontiersmen.info/
Legion of Frontiersmen Historians & Archives Research Group
https://frontiersmenhistorian.info/
Legion of Frontiersmen archive, Bruce Peel Special Collections, University of Alberta
https://bpsc.library.ualberta.ca/collections/legion-of-frontiersmen-collection
including the Sam Steele collection (possible links to LoF men)
https://library.ualberta.ca/steele