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Finland

Episode number: 1

Overview: Maritime archaeologist Andy Torbet investigates an ancient sea fortress that was crucial to Finland and military historian Alex Churchill investigates a stolen Soviet tank and the Molotov Cocktail.

Britain

Episode number: 2

Overview: How Britain has defended its coastline for nearly a thousand years since the Norman invasion – seeing off threats from Napoleon to Hitler.

Poland

Episode number: 3

Overview: The story of how Poland, one of the most invaded countries in Europe, has survived against all the odds.

The Netherlands

Episode number: 4

Overview: The story of how the Netherlands, locked in a constant battle with water, has harnessed this threat to become a powerful European player.

France

Episode number: 5

Overview: Discovering how France constructed ingenious fortifications, on a massive scale, to defend itself against attacks from the east.

Spain

Episode number: 6

Overview: The impressive fortifications and defensive strategies used during Spain’s dramatic history of conflict, from the Middle Ages to the Civil War.