An academic article (free access) on the use of light detection and ranging (LiDAR) to discover remaining material traces of the combat around St. Vith during the Battle of the Bulge:
https://www.cambridge.org/core/journals/antiquity/article/lidar-and-conflict-archaeology-the-battle-of-the-bulge-19441945/5050B5FFFAA961C3F75FF7FBC4FE1F4E
https://www.cambridge.org/core/journals/antiquity/article/lidar-and-conflict-archaeology-the-battle-of-the-bulge-19441945/5050B5FFFAA961C3F75FF7FBC4FE1F4E