ERR reports the Baltic defense line project is already reshaping the southeast frontier.
Archived version: https://archive.is/newest/https://euromaidanpress.com/2025/09/16/estonia-is-digging-a-40-km-trench-to-stop-russian-tanks-and-600-bunkers-are-next/
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Here’s what they probably used to dig it, you see things like this being used all the time in agri-heavy areas.
spoiler
Rule of thumb, if it has two sloped sides it’s not going to stop an armored vehicle.