The Snake River Confederacy had its roots in the Successionist movements in Idaho and Oregon that had grown enormously after the 1935 breakup of the US. While many groups, such as Virginia, Las Vegas, etc. declared independence immediately, much of the West and Northwest simply established provisional governments. In fact, Idaho, Oregon, Washington, Wyoming, and Montana all carried on like business as usual, as most political issues there were internal, and none of them had much influence, anyway. However, as bush wars in California and Texas began to filter up, and with Commonwealth forces massing on the northern border, the provisional governments realized that actions needed to be taken to ensure America's survival. After a short debate, all the provisional governments agreed that Idaho, eastern Oregon, and parts of Wyoming would go to an Idahoan government, while the Willamette and Washington would go to a Washington-based nation. On July 4th, 1939, both nations declared independence from the US.