Complex sentence: The army requested to end the war with more lenient conditions by a diplomatic way, because they were facing a much stronger far-eastern Soviet army at the northern Manchukuo border and wanted to avoid endless attrition warfare.
Split into simpler sentences: The army requested to end the war with more lenient conditions by diplomatic way. Because they were facing much stronger far-eastern Soviet army at northern Manchukuo border and wanted to avoid endless attrition warfare.