These are the conflicts that have changed societies, re-drawn maps and claimed millions of lives. As with any period in recorded history, the past century has seen conflict rage across the globe. Yet as the pace of technological advance has accelerated, so too have the wars we have fought grown larger and more destructive. From tanks and aircraft to guns and nuclear bombs, the past 100 years have seen the race for new and improved weapons of war play a major role in shaping our world. Now, take a close look at the people, battles, technology and strategies that have won and lost the greatest conflicts of the last century; World War I, The Great War, where a new breed of soldier took to the skies in planes and airships and fought a new type of war, while millions fought and died in the trenches, where poison gas and armoured tanks brought new horrors to the battlefield; World War II, the deadliest conflict in human history, in which the fight was carried to every corner of the globe, by land, sea and air; The Korean War, which saw a violent clash of political ideologies play out on the Korean peninsula, with casualties in the millions and effects that are still felt today; The Vietnam War, a conflict that scarred a generation and brought the realities of war into the homes of civilians as never before; The Cold War, a period of prolonged tension and mistrust, fuelled by contrasting philosophies and shaped by the fear of mutually assured destruction; and on to the wars in Afghanistan and Iraq that have dominated our headlines for over a decade and continue to do so.