Following the application of the chemical it was quickly realised that something had gone. During transit from Germany on board U234 the V 4 had been stored next to the Uranium Oxide. Unfortunately the Uranium Oxide was not sealed correctly and was therefore able to contaminate the V 4 chemical. This contamination caused the V 4 to completely reorganise the victims body chemistry to make them very different from what was intended. Essentially the victims body chemistry was completely reordered and gave rise to a very different life form - a life form that was ferocious, cunning and above all, sentient.
Initially the Japanese scientists opted to keep the Kaiju or 'monster' in a secure holding area in the laboratory complex as the initial batch had already killed a number of investigating scientists and armed guards. As well as being ferocious close combat specialists the Kaiju possessed the ability to convert certain mechanical items into biological versions of the same by coating the said object in a secreted bodily fluid - as a result of this they were soon able to arm themselves with 'living guns'.
The Kaiju were 'asexual' and were able to lay eggs to produce their offspring so in a fairly short space of time they quickly increased their numbers. The Japanese scientists, realising that this experiment had gone very wrong were going to blow the entire complex up to eradicate the menace within.
They were too late - the USAAF did this for them in the shape of a vast B29 raid that destroyed the laboratory, the out buildings and everything in it.
Or had they?
The Americans were aware that the Japanese had been experimenting with the German V 4 chemical and so assumed that by way of survivors from the bombing raid (assuming there were any) all they would encounter would some of the Zombie types. A special Airborne unit was hurriedly assembled with the intention of dropping on the site, collecting any data that may still be found and getting the results back to the US Intelligence service in advance of the landing being planned.
It would be quick 'smash and grab' raid and as the troop transports headed off into the Japanese night sky the paratroopers confidence was high.
To be continued....