Project Pendragon not only called for anti-ballistic missile defense and continuity of government plans for Belka should the nation ever engage in nuclear war, but also the capability to retaliate with indigenously manufactured nuclear weapons. The first of these was the Vergeltungswaffe 1(Western: Retaliatory Weapon 1). Despite having a strategic yield of 200 kilotons of TNT, the V1 was designed with tactical usage in mind, and was intended to be utilized as an area denial weapon.
Although Belka had never maintained a nuclear weapons program prior to the 1980s, Osea stationed some of its nuclear arsenal on Belkan Air Force bases so they could be brought over the North Pole and dropped on Yuktobania in the event of a nuclear exchange. The South Belka Munitions Factory had also secured numerous subcontracting deals on the manufacturing of Osea's nuclear stockpiles. From this experience the SBMF began work on the V1, basing it on the Osean-designed B28 airdropped nuclear freefall bomb. Specifically, the V1 was a variant of the B28FI which was intended for laydown delivery - low-level deployment by parachute followed by ground-level detonation. The V1, however, left out the parachute so it could be dropped from high altitude and its reinforced exterior buried into the ground upon impact. After burying deep enough it would detonate, producing a limited shockwave and fireball but dispersing a cloud of radioactively contaminated debris over a wide radius. In this sense it was to function more like a dirty bomb than a traditional nuclear weapon. More conventional variants were planned but never produced.
The June 6th explosions
Seven V1s were dropped on the South Belka/North Belka border on June 6th, 1995, to deter the Allies from advancing any farther. This brazen act led to the overthrow of the Belkan government by moderates and the war's end. The blasts themselves were in sparsely-populated areas and inflicted 12,000 casualties on the Allies and local civilians, but hundreds of thousands of more deaths have been attributed to the radiological side effects that will remain for centuries. Since 1995 most of the border has become an uninhabited zone of alienation quarantined by both the Osean and Belkan governments, and prevailing winds to the east have blown fallout over Belka's eastern neighbors. Abnormally high cancer rates in Recta and Gebet have been blamed on the detonations, and costly decontamination programs continued in those nations for the next decade.
Although Belka officially gave up its nuclear arsenal at the end of the Belkan War, the Grey Men and Gründer stockpiled V1s at Mount Schirm's mine facilities. Not requiring authorization from higher command authorities for detonation, the Grey Men intended to distribute them to hardline factions in Osea and Yuktobania to escalate the Circum-Pacific War. Three weapons were recovered from the mine before its destruction, and one was successfully transported to Yuktobania. This warhead's transport was shot down by MANPADS-armed Yuktobanian rebels and the nuke itself was disarmed. Ultimately no V1s were detonated in the conflict, but they bought the Grey Men enough time to bring the V2 and the SOLG online.