Radar Scans Uncover an Alaskan Fort Built to Scare Off Russia 27 JANUARY 2021 The Shís'gi Noow or "sapling fort" was built by the Tlingit people in Alaska at the start of the 19th century: one last physical barrier to advancing Russian forces. Now, thanks to modern-day radar and imaging techniques, it's been rediscovered.
After the pivotal battle there in 1804, which marked the start of six decades of Russian rule, the true location of the Shís'gi Noow had become uncertain – until new research found the fort's unusual perimeter shape in Sitka National Historical Park, at the mouth of Kasda Heen (Indian River).