Because of their location, status, role and nature, royal guards have frequently been able to play a political role beyond their intended military and social ones. In times of revolution, the continued loyalty or defection of such units has often played a key part in the outcome of wider unrest. Historical examples were England in 1688, Spain in 1808, Sweden in 1809, France in 1789 and again in 1814-15, Russia in 1917 and Persia in 1906 and again in 1953.