1. Battle of Abiqua Pass (1856): This conflict occurred during the Rogue River Wars and took place near present-day Salem, Oregon. It involved fighting between the U.S. Army and Native American tribes.
2. Battle of Fort Stevens (1865-66): This battle occurred during the Civil War at Fort Stevens, located near Astoria, Oregon. Union troops successfully defended the fort against Confederate naval forces, making it the westernmost land battle of the Civil War.
3. Malheur National Wildlife Refuge Occupation (2016): This armed occupation involved members of an armed militia group who took over the Malheur National Wildlife Refuge in Harney County, Oregon. The occupation lasted for 41 days and resulted in a peaceful resolution.
4. Battle of Umatilla Landing (1855-56): This conflict took place during the Yakima War near the present-day city of Umatilla, Oregon. It involved fighting between the U.S. Army and Native American tribes.
These battlefields represent significant historical events and offer glimpses into the conflicts that have shaped Oregon's past. Please note that these are a few examples, and there may be other battlefields or historically significant sites in Oregon.