Complex sentence: Japanese internal food production declined by approximately 26% in the last two years of the The Pacific War when the government prioritized resources, such as animals, fertilizers and tools, towards the war effort that had previously been extended to farmers.
Split into simpler sentences: Japanese internal food production declined by approximately 26% in the last two years of the The Pacific War. This decrease occurred when the government prioritized resources towards the war effort, such as animals, fertilizers and tools, that had previously been extended to farmers.