The Tlingit “came up so stealthily in the darkness that we saw them only when they began to stab at our tents. ... We shot at them without any result because they had on thick armor made of three and four layers of hard wood and sinews, and on top of that had heavy mantles made of moose hides. On their heads they had thick helmets with the figures of monsters on them, and neither our buckshot nor our bullets could pierce their armor. In the dark, they seemed to us worse than devils. The majority of them kept perfect order, advancing toward us and listening to the commands given by one voice and only a part of them ran back and forth doing damage to us and to the Natives in our party."
—Aleksandr Baranov, as quoted in Nora Dauenhauer, Richard Dauenhauer, and Lydia Black, eds., Anóoshi Lingít Aaní Ká, Russians in Tlingit America: The Battles of Sitka, 1802 and 1804 (Seattle; Juneau: University of Washington Press; Sealaska Heritage Institute, 2008).
This was part of the first battle between Tlingit and Russians, and it happened in 1792 on Hinchinbrook Island in Prince William Sound. (See my original post on the event for more details.) This is the sort of primary source that students in history class should be reading all the time—exciting, surprising, and open to question. Paired with these photos of from the "Rainforest Warriors" exhibit by Naal Xák'w (Tommy Joseph) at the Alaska State Museum, it makes for some great material.