sentences:  Intelligence analysis of the failure, as well as Irwin's own personal analysis of the campaign attributed significant demoralisation and rising discontentment amongst Indian troops due to the subversive activity of INA agents at the frontline, as well as rising nationalist (or “Pro-Congress”) sentiments.The activities of these agents were addressed at the Sepoys and these found enough support to successfully encourage defection without attracting the attention of the officers commanding the units.Soon, defection by British Indian troops had become a problem significant and regular enough in the Burma theatre to form a regular part of the intelligence summaries in the first half of 1943.