Final answer:
The earliest clue of Taekwondo's existence can be found in excavated wooden or bamboo strips or tablets called mokgan or mokkan, which provide insights into the population and history of the region.
Step-by-step explanation:
The earliest clue of Taekwondo's existence can be found in excavated wooden or bamboo strips or tablets called mokgan or mokkan, discovered in the Han colonies in the northern Korean peninsula. These texts provide insights into the population and history of the region. For example, a census from 45 BC shows that there were 280,000 people in 45,000 households under Han dynasty command. Additionally, early wooden tablets from a cemetery of Paekche royalty dating from the late sixth or early seventh century also contain Korean phonetic scripts mixed in with Chinese characters. These early records contribute to the understanding of Taekwondo's historical origins.