Complex sentence: Since the nuclear bomb was never invented the Americans are no longer to be feared, there was no bombing of Hiroshima so secretly the Japanese have been building a vast army with technologies and weaponry that forces the allies and soviets to once again ally.
Split into simpler sentences: Since the nuclear bomb was never invented the Americans are no longer to be fearer. There was no bombing of Hiroshima so secretly the Japanese have been building a vast army with technologies and weaponry that forces the allies and soviets to once again ally.