An expensive warship can be damaged or destroyed by much cheaper land-based artillery.British decision-makers underestimated Turkish defences and ignored disagreeable intelligence The proliferation of cheap, land-based systems such as drones and missiles means traditionally much weaker states — and even non-state actors — can effectively contest seaways against the most costly, sophisticated militaries.We should be as critical of the current Iran war as we are of the Gallipoli campaign today