en.wikipedia.org/wiki/List_of_massacres_in_the_United_States

Authoritative summaries of the West Nickel Mines school shooting list six total deaths, not seven.

HISTORY states that Charles Roberts fatally shot five female students and then died by suicide. The FBI likewise says that in the attack on the West Nickel Mines School, five people were killed and five were wounded, while the shooter died by suicide. That makes six deaths total including the gunman, not seven.

So the table's death-toll entry "7 including the gunman" is incorrect.

The cited location conflates the Dawson Massacre with San Antonio itself.

According to the Handbook of Texas entry on the Dawson Massacre, Texan forces had gathered on Salado Creek, and Dawson's company was intercepted "near Caldwell's embattled line" during the Battle of Salado Creek. The same source explains that Dawson's men fought in a mesquite thicket where Fort Sam Houston later stood—not at the presidio.

A separate Handbook of Texas entry for Salado Creek (Bexar County) confirms that Salado Creek, which runs through the eastern portion of San Antonio, was the site of the battle of Salado Creek in 1842. That places the massacre near Salado Creek, not at the Presidio San Antonio de Béxar.

So the article's location field is factually incorrect: the Dawson Massacre was associated with Salado Creek / east of San Antonio, not the Presidio San Antonio de Béxar.

This entry links the Black Bean Episode to Salado, Texas, but the executions occurred at Salado in Mexico.

The Handbook of Texas entry on the Mier Expedition states that after the Texans escaped, they were recaptured and "returned to Salado." It then explains that Governor Francisco Mexía of the state of Coahuila handled Santa Anna's order and that the 17 men selected in the Black Bean Episode were executed there. Because Mexía was governor of Coahuila and the Mier Expedition was operating in Mexico south of the Rio Grande, this Salado was in Coahuila, Mexico.

So the article's location field is not just imprecise; it points to the wrong place entirely by identifying the site as Salado, Texas.

Multiple historical references place the Camilla Massacre on September 19, 1868.

The New Georgia Encyclopedia states plainly that "The Camilla Massacre, which took place on September 19, 1868". A Georgia state historic-preservation publication likewise describes the event as occurring on September 19, 1868.

Because the article lists the event as "1868 September 23," its date field is inaccurate.

The Handbook of Texas places the Dawson Massacre during the Battle of Salado Creek on September 18, 1842. Its account says Texas forces were fighting at Salado Creek on September 18 when Dawson's company was intercepted nearby and massacred.

Because the article gives the event date as "1842 Sep 17," the date field is off by one day.