Between 1935 and 1938 the system of premanent fortification was built at the territory of Czechoslovakia. The fortification was aimed at detaining the attack of German army until the mobilisation would be carried out. The construction was partially based on the fortifications built along the Maginot Line in France.

The fortress Adam was also a part of the Czechoslovak fortification.The fortress Adam was built between 1936–1938, near the village of Mladkov in Eagle Mountains. This was the region where the main German attack was expected to take place. The fortress Adam consists of eight military installations: two artillery log cabins, tree infantry log cabins, mortan tower, artillery revolving tower and entrance building.

The fortress was supposed to have a garrison of 611 men. The main weapon of the fortress were supposed to be howitzers of 10 cm calibre, model 38., that were situated in the artillery log cabin and artillery revolving tower. Howitzers and artillery revolving tower were not constructed before the end of September 1938. The fortress was armed especially with heavy and light machine guns and anti-tank cannons.

On 30 September 1938 Germany, Italy, France and Great Britain signed the treaty in Munich, forcing Czechoslovakia to surrender a part of its border area to the nazi Germany.

The fortress Adam was situated in the surrendered area and the German army thus took hold of it without any fight. During the Second World War, the German Army tested artillery guns on the fortress Smolkov and some installations thus suffered a serious damage.

At present the fortress belongs to the Czech army and its underground areas are not accessible to the public!