A loopgraaf is a trench. They were most famously deployed in World War I, when the Netherlands was neutral, but also in other wars.
Dutch term – Loopgraaf
Yvette Hoitink, CG® is a professional genealogist in the Netherlands. She holds the Certified Genealogist credential from the Board for Certification of Genealogists and has a post-graduate certificate in Family and Local History from the University of Dundee. She has been doing genealogy for over 30 years and helps people from across the world find their ancestors in the Netherlands. Read about Yvette's professional genealogy services.