Initially a colonial police officer, Sing joined both the anti-Japanese resistance network during World War II, and the anti-French Lao Issara nationalist guerrilla movement from 1946 to 1949.
After the Kingdom of Laos gained its independance on October 1953, a small group of Laotian officers with military experience were speedily promoted to much higher command positions than they were accustomed to.
Many officers were also commissioned into the upper ranks directly from civilian life; they tended to gain their posts through family or political connections rather than any training or ability.
[5] When Captain Kong Le seized the capital during his coup, Sing also declared his support, though what role he played in Phoumi's subsequent counter-coup in December 1960 is still unclear.
In a meeting that took place at Ban Namone, located between Vientiane and the Plain of Jars,[7] it was agreed that the International Control Commission (ICC) established by the 1954 Geneva accords would be revived to monitor the truce.