Why did conflict arise between Henry Il and Thomas Becket?

Conflict arose between Henry II and Thomas Becket primarily due to power struggles and disagreements over the authority of the church in relation to the monarchy.

As Archbishop of Canterbury, Becket was a close friend and advisor to Henry II. However, upon his appointment as Archbishop, Becket began to assert the authority of the church and push back against Henry's attempts to control ecclesiastical affairs. This led to tensions between the two men as Becket refused to compromise on matters of church independence and jurisdiction.

The breaking point came when Henry II sought to impose secular laws on the clergy, including the right to be tried in royal courts instead of ecclesiastical ones. Becket vehemently opposed this intrusion on church authority, leading to a string of conflicts and confrontations between him and the king.

Ultimately, the conflict between Henry II and Thomas Becket culminated in Becket's excommunication and eventual assassination by four of Henry's knights, with many historians believing that Henry may have indirectly instigated the murder due to his frustration and anger with Becket's defiance.