Though this feast was instituted after Vatican II, it is worthy of notice that all the Saints commemorated tomorrow for the "Feast of St. Andrew Dung-Lac & Companions" are truly indeed Saints, having shed their blood for Christ. If one prefers not to give them the title of "Saint", it should also be noted that Leo XIII raised St. Andrew Dung-Lac to "Blessed", along with 61 of his companions, according to Wikipedia.

St. Andrew Dung-Lac was born into a pagan family. His birth name was Tran An Dung (Dung, in the Northern dialect which St. Andrew spoke is pronounced either as Zung - hence the occasional spelling, Dzung, or, mispronounced Rung). His family, originally from Bac Ninh moved to Ha Noi to seek a living. At age 12, he was taken under the tutelage of a French priest, after which he was baptized with the name Andrew. He was then sent to a seminary in Nam Dinh and was ordained a priest in 1823, at age 28.

One decade later, there was a rebellion supported by the French to overthrow Emperor Minh Mang and replace him with a Catholic prince. The reaction from the government was harsh. Another priest who supported the rebellion, Saint Joseph Marchand was martyred by slow-slicing, or "the death of a thousand cuts" - an execution method reserved for only the most wicked crimes such as murdering one's parents, which is essentially the slow and methodical removal of parts of the body by knives until the victim dies.

St. Andrew narrowly escaped from the government several times (partly because he changed his name from Dung to Lac) before being caught and beheaded.