The main idea behind this project is that everything is centered around early introduction of renewable energy technologies and liquid biofuel fuel (derived from algae grown in mass aquaculture), so many new means of transportation, like diesel ships and locomotives with combustion engines, appeared significantly earlier. For example, diesel ships were already present in the late 17th century. That's why many major colonial empires of the past, like Charles V’s empire, were able to survive to the industrial age and spread their influence across the planet faster.

In this timeline, the Holy Roman Empire was able to survive to the 20th century as a strong colonial superstate, but it collapsed in the end of WW2, so only some African colonies remained under control of government-in-exile. Although after WW2 majority of states and regimes entered the Global Defense Pact, which was created on the basis of a wartime allied coalition, there still was a threat of a conventional war with the so-called Outcasts, former members of the Axis and their satellites, who, despite the damage caused to them by weapons of mass destruction at the end of the war, were still a formidable force.

Due to extensive use of nuclear, biological, chemical, tectonic and other types of mass destruction weapons, WW2 ended in a stalemate, and both sides started preparing for the new conflict. And border fortifications were a part of it. Particularly this type of pillboxes was installed by HRE Armed Forces on the border with Cameroon. Members of the Global Defense Pact in the post-war years invested significant resources in the creation of military infrastructure in the African countries bordering the Empire, and soon there was talk of creating a ring of solid defense capable of stopping the advance of the Empire's forces on all fronts in the event of a new war. Cameroon played one of the key roles in this ring of defense, since if the Pact lost control over the territory of this state, the troops of HRE could easily pass along the Atlantic coast of Africa in order to further connect with the armed forces of another Outcast, South African Union, in the occupied territory of Namibia. In order to prevent this, the Pact deployed a significant military contingent in Cameroon, the basis of which was the British colonial troops. In turn, the government of HRE saw this move as a preparation of a bridgehead for an offensive on its territory, in particular on coastal areas rich in uranium ores that were necessary to meet the needs of a growing arsenal of nuclear weapons.

The Empire's economy was in distress - most of the population consisted of European and South American refugees forced to live in temporary camps and tent cities, as well as the indigenous population, whose standards of living were extremely low even before the war. Industry barely made it possible to make ends meet - most of the plants evacuated from Europe were simply unloaded in an open field, provided with the minimum necessary infrastructure. Under such conditions, military engineers had to improvise, an example of which is long-term firing points equipped with turrets of A-29 “El Cesar” heavy tanks. These vehicles belonged to the outdated concept of an assault heavy tank with thick armor, powerful armament and mediocre mobility. They were superseded by main battle tanks at the end of World War II, so the Imperial Ministry of Supply did not hesitate to allow the old tanks to be converted into long-term gun emplacements. A thick-walled casted turret in combination with a 120 mm gun, mounted above an armored box and additionally strengthened with reinforced lignocrete (concrete with addition of plant-derived phenolic plasticizers, like lignin) slabs, even in the post-war years was a serious threat to both the infantry and the advancing armored vehicles of a potential enemy.