The tank is an emblem of state power, a behemoth that has transformed wars and threatened – and sometimes mown down – civilians. But it has also been seen as a ‘cubist slug’, has inspired a modernist song and dance routine Tanko, has led military men to philosophize, and installation artists to appropriate the rhomboid shape to suggest the ultimate in urban alienation. In short, the tank, as Tank so skilfully and wittily and sadly shows us, stands at the very heart of the twentieth century and points up its follies, its wickedness, its aspirations, its delusions – and occasionally its humanity.