The Great Northern Fort was a massive Alaskan fortification located in the town of Klastok in the Evgenigrad-Klastok Oblast from the early 1870's until it was deconstructed in the mid-1930's. At the prime of its use, it was envisioned as the central staging ground for the Alaskan Army of the East against rogue Indian tribes and later the Americans, and its complex fortifications, raised location and array of cannon made it a nearly impregnable, but eventually unsustainable, location for battle. While its location proved successful in diverging and thinning American positions across 200 miles in 1884, a more concentrated attack in 1885 proved that the fort was unsustainable for long periods of time with a finite amount of food and gunpowder, and the fort was surrendered on September 11, 188