What were the means adopted by Ashoka to spread the message of dhamma?

The methods adopted to spread the message of dhamma were:
• Ashoka appointed officials, known as the dhamma mahamatta who went from place to place teaching people about dhamma.
• Ashoka got his messages inscribed on rocks and pillars, instructing his officials to read his message to those who could not read it themselves.
• Ashoka also sent messengers to spread ideas about dhamma to other lands, such as Syria, Egypt, Greece and Sri Lanka.

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