Often we think of war and peace as binary states - one is either at war or at peace. But history is full of examples of the line between those two states being blurred, and in a modern world of nuclear weapons and globalised economic and military competition, that competitive state between war and peace has grown particularly prominent. When Russia overtook Crimea in 2014 with its "little green men" the world got a high visibility view of what a hybrid war, combining information warfare, unconventional methods and conventional military force might look like. Today, I want to give an overview of hybrid war methods, their potential, and potential defences against them.