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BattleField Detectives examines the strategy and the technology behind the Siege of Alesia a battle in 52 BC between Rome forces led by Julius Caesar and the Gallic tribes under Vercingetorix. After an extended siege, Caesar wins a decisive victory over the Gauls and ensures Roman domination of the area for centuries.

Before dawn on Sunday April 6th 1862, shots rang out near Shiloh, on the west bank of the Tennessee River. A Confederate army had launched a surprise attack on their unsuspecting Union enemy. The Confederates had chosen the battlefield. They had chosen the moment to attack. And they achieved almost total strategic and tactical surprise. Twelve hours later they seemed to be in a commanding position – but on the next day they withdrew in disarray. For nearly 150 years Confederate failure has been blamed on the fact that they lost valuable time at a place called the Hornet’s nest – where a detachment of Union soldiers held the line. But now forensic history is uncovering a very different story of why things went so badly wrong for the Confederates at the Battle of Shiloh.

In 1967 the tension in the Middle East had neared boiling point. Border incidents between Israel and Syria, Egypt, and Jordan had increased massively during the early 1960s, with Palestinian guerrilla groups actively supported by Syria. Fighting on three fronts, against the combined might of five different armies, Israel secured a stunning victory in a mere six days. So how did this tiny state manage to overcome an Arab enemy which had twice as many soldiers, three times as many tanks and four times as many airplanes? Field testing of key Israeli weapons and analysis of battlefield strategy on both sides shows how this extraordinary victory was achieved.

Dawn on the 6th June, 1944. The largest invasion in history is underway. Four miles to the west of the Allied landings at Omaha Beach, a flotilla of landing craft head towards Hitler’s ‘Atlantic Wall’ defences. The landing craft were carrying just 200 men, of a newly trained elite force - the United States Rangers. Their objective was the vital German coastal defence gun battery on the headland known as the Pointe du Hoc. Climbing the ninety foot cliffs under a storm of German bullets and grenades, the Rangers found that the German guns were not where they should be. What followed was a desperate game of cat and mouse, as the Rangers attempted to hunt down the guns. The story of their mission is remembered now as one of the most extraordinary aspects of the D-Day landings. How did the heavily outnumbered US Rangers take, hold and destroy the guns of Pointe du Hoc?

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Far from being the final step in the conquest of the USSR, Stalingrad proved a bloodbath. Half a million Germans were killed and almost three times as many Russians lost their lives. Total casualties are estimated to be over two million. The German Army was modern, well-trained and well-led, with state of the art military equipment, high morale and a string of victories behind it. By comparison the Red Army was inexperienced, old-fashioned and ill-equipped. So how did the Russians win? Legend has it that it was ‘General Winter’ who defeated the German Army - but forensic analysis and historical research show that coping with freezing weather was not the only ace in the Russians’ packs.

The Battle of Jutland between Britain and Germany was the largest naval action of all time. It was a confrontation that the British wanted. An opportunity to unleash their lethal super weapons of the day – the great ships they called Dreadnoughts – and to prove that Britain still ruled the waves. Yet, in the cold grey waters of northern Europe, the showdown ended in carnage on a scale few could have imagined. Today the ships with their vast gun turrets and thousands of shells still litter the sea bed. Nine thousand lives were lost, the majority British. Thousands were blown apart in three catastrophic explosions. Now, using the latest modern science, Battlefield Detectives investigates and asks: what went wrong? Why was Jutland so disastrous for the Royal Navy? And could it be that, in losing the battle, they won the naval war?