Complex sentence: He recruits India and persuades them to perform an all-out offensive on Burma; in doing so, the country is forced to create long supply lines which Bean (who is training soldiers in Thailand in an effort to stop him) constantly disrupts.
Split into simpler sentences: He recruits India and persuades them to mount an all-out offensive on Burma. This requires the country to defend long supply lines that Bean (who is training soldiers in Thailand in an effort to stop him) constantly disrupts.