Singapore Armed Forces (SAF) suffered a data breach in this incident, the training centre had uploaded pictures taken at the recruits' graduation ceremony to Facebook.
However, there was a link in there that showed the troops' pictures and ID card numbers.
When the error was discovered, BMTC promptly withdrew the link to the portraits.
Source: https://www.databreaches.net/singapore-armed-forces-apologizes-for-data-leak/
"id": "SIN04526722",
"linkid": "singapore-armed-forces-saf",
"type": "Breach",
"date": "03/2017",
"severity": "60",
"impact": "3",
"explanation": "Attack with significant impact with internal employee data leaks"