In this episode of the Western Front Association’s Mentioned in Dispatches, researcher Gary Guess shares his work on the 12th (Service) Battalion of the Yorkshire Regiment, known as the Teesside Pioneers. Recruited largely from Middlesbrough and surrounding towns, the battalion served with distinction in France, combining infantry courage with engineering labour under fire. Guess, who has spent six years uncovering their history and has a personal family connection, reveals the story of this remarkable unit.