March 6, 1836, 181 out of 187 defenders of a old Spanish Mission near San Antonio Tx were killed in the assault. The other six were executed not taken prisoner.Actually, there were statements from both Union and Confederate survivors claiming there was a massacre.
And Forrest's own report of the battle largely agrees with Wikipedia, not you, on casualties. Forrest said that 228 Union troops, "were buried on the evening of the battle, and quite a number were buried the next day by details from the gun-boat fleet." and that "We captured 164 Federals, 75 negro troops"
So if the Wikipedia entry was inflated, it should be claiming that there were at least 467 Union dead. Throw in those "quite a number" buried the next day, plus any wounded and the number would easily exceed 500.
Instead, Wikipedia says "the Union losses were reported as 277 to 297 dead."
Also, using Forrest's numbers, his troops buried nearly 40% of the Union troops on just the first day. That's unusually high casualties for the defenders of a storming.
480 BC 300 elite troops and 500 allies assaulted and killed to the man in a pass in Greece.
30 April,1863 Hacienda Camarón Mexico 65 French troops die to the man. For some reason the Légion étrangère keep the wooden hand of the Commander of this battle as an Icon.
22 Jan. 1879, 800 out of 850 British troops and as many as 200 native allies die in the assault of Chemsford's camp at Isandlwana.
That is three assaults that killed 100% and one that killed 80% of the defenders Ft Pillow's defenders had about 60% killed. Three of these assaults happened within 30 years of Ft.Pillow.