The end of the Western Front was at Pfetterhouse, a small village about 18 miles south-east of Belfort. The Swiss frontier post on the D10 to the south-west of the village marks the end of the line. The trenches just stopped at a barbed wire fence.
Enclosed is a map and . . . would you believe it, colour photos of the scene! Plus some more Swiss troops; note the similarity to Belgians.
"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.