Dan Snow has admitted that during the production he bickered with his father about the significance of certain battles such as the Spanish Armada at Gravelines and who won the Yom Kippur war.

Dan Snow takes part in a training exercise with the Royal Navy where they tackle a simulated engine room fire.

Covers the Tet Offensive, in particular the fighting at Saigon and Khe Sanh, but the main focus is on the Battle of Hue.

It also briefly covers the six day war of 1967, in which Israel launched a preemptive strike against Syria, Jordan and Egypt.

It covers in most detail the air campaign (noting the changes in tactics to respond to international pressure) and then the ground attack.

No individual engagement is given priority, though an amount of time is given to non-combat events, such as the burning of oil wells and SCUD attacks on Tel-Aviv.