When you search for “10 forgotten incidents” of racial violence, the headlines you encounter usually spotlight the most recent unrest. Yet the United States bears a longer, darker ledger of bloodshed that many Americans have never learned about. Below, we count down ten overlooked eruptions of hate, each a stark reminder that the struggle against racism stretches back centuries.
10 Cincinnati Riots Of 1829
The Cincinnati riots of 1829 rank among the earliest recorded flare‑ups of anti‑Black sentiment aimed at immigrant communities in the United States. White Irish laborers, who felt their jobs threatened by a swelling free‑Black population, spearheaded the violence. Ohio, a free state, had become a sanctuary for African Americans escaping slavery or seeking a fresh start in the western frontier. Between 1825 and 1829, the Black community in Cincinnati ballooned from roughly 700 individuals to nearly 3,000, alarming many white settlers.
Most of the alarmed whites were impoverished Irish immigrants who feared that newly arrived, unskilled former slaves would displace them from low‑wage labor. In August 1829, about 300 white rioters descended on Black neighborhoods, intent on driving the residents out of the city. Initially, Black leaders urged the community to stay put and defend their rights, but the onslaught proved too ferocious. Many chose to flee northward, seeking safety across the Canadian border. A few thousand succeeded, establishing Black towns in Ontario, while a substantial number remained in Cincinnati to endure continued hostility for decades.
9 Greek Town Riot
Anti‑immigrant animus is not a new American story. While most people connect such prejudice with Irish or Mexican newcomers, the early twentieth‑century United States also witnessed a virulent backlash against Greek settlers. In 1909, a police officer in South Omaha arrested a young Greek immigrant; the man drew a pistol and shot the officer, igniting a firestorm of hatred.
Newspaper editorials across Nebraska branded the Greeks as a menace to the working class, fanning the flames of bigotry. On February 21, 1909, a mob of roughly 3,000 men descended on the Greek enclave known as “Greek Town,” assaulting homes and beating men, women, and children indiscriminately. One Greek boy lost his life during the chaos, and community leaders pleaded with Omaha authorities for protection.
Help never arrived. The Greek community, feeling abandoned, organized a mass exodus. Within weeks, the streets of South Omaha were empty of Greek residents, a stark testament to the power of racially motivated terror.
8 Orange Riots
The nineteenth‑century “Orange Riots” in New York City stand out as one of the deadliest, yet largely forgotten, episodes of sectarian violence. The conflict pitted Irish Protestants—known as Orangemen—against Irish Catholics. An 1870 holiday march by the Orangemen resulted in eight deaths, and the following year, the city banned a repeat parade, inflaming Protestant resentment.
After relentless lobbying, officials finally permitted the Orangemen to march in 1871, but only under the watchful eye of the National Guard. As the procession rolled through streets teeming with Irish Catholics, the Catholic crowds opened fire with rifles and rocks. The Guard responded with musket fire and bayonet charges, while police also discharged weapons and even ordered a cavalry charge.
The violent clash left roughly 60 dead and 150 injured, a tragedy that faded from public memory despite its magnitude.
7 Camden Riots Of 1971
In August 1971, a routine traffic stop in Camden, New Jersey, turned fatal when police officer Rafael Gonzales was beaten to death by an officer who claimed self‑defense. The officer faced no immediate charges, sparking outrage among the city’s Hispanic population.
Protests escalated into full‑blown riots on August 20, 1971, after city officials, while technically charging the officer, allowed him to keep his job. For three days, Camden streets became a battlefield: looting, arson, and violent confrontations with police who deployed tear gas and opened fire on demonstrators. The chaos resulted in 90 arrests and, eventually, the suspension of the offending officer.
Although largely forgotten today, the Camden riots echo the later 2015 Baltimore unrest, underscoring enduring issues of police brutality and community disenfranchisement.
6 Houston Riot Of 1917
When the United States entered World War I, the all‑Black Third Battalion of the 24th Infantry Regiment was stationed in Houston, Texas—a city deeply entrenched in segregation. Tensions rose after Houston police violently arrested an African‑American woman, prompting Black soldiers to intervene in her defense.
During the ensuing scuffle, a police officer shot an African‑American soldier three times without killing him, a brutal act that inflamed the battalion. Commanders ordered soldiers to surrender their weapons, but instead the men seized the armory, marched into town, and exchanged fire with police and white civilians. The night‑long gun battle claimed 19 lives.
In response, Houston imposed martial law. The ensuing court‑martial, the largest in U.S. military history, resulted in 19 death sentences—carried out by hanging—and 63 life‑sentence imprisonments, despite the soldiers’ defense highlighting systemic racism.
5 Thibodaux Massacre
In 1887, the town of Thibodaux, Louisiana, became the stage for a three‑week labor strike led by thousands of African‑American sugarcane workers demanding better wages and payment in U.S. currency rather than company scrip. Early attempts at negotiation failed, and the state judge, former slaveholder Taylor Beattie, declared martial law, restricting Black residents’ movement without special passes.
A vigilante group surrounded the strikers, and when the workers fired upon the group, killing two members, the violence escalated dramatically. Over the next three days, white vigilantes executed strikers on sight or in nearby woods. Official records list 35 dead, but historians estimate up to 300 casualties.
Every victim was African American, while the aggressors were overwhelmingly white, underscoring the racial dimension of this labor conflict.
4 Agana Race Riot
During World War II, the United States seized Guam and turned it into a strategic air‑strip hub for B‑29 bombers. African‑American Marines of the 25th Depot Company were stationed near the island’s capital, Agana, where they faced hostility from white Marines who tried to bar them from the city, especially when seeking local women.
Months of mounting tension climaxed on Christmas Eve 1944 when a white Marine fatally shot an African‑American Marine over a dispute involving a local woman. Although the shooter faced court‑martial, the Black Marines remained enraged. Nine African‑American Marines attempted to enter Agana using leave passes; white Marines opened fire, allowing eight to escape while one was left behind.
Rumors that the stranded Marine had died prompted a convoy of 40 Black Marines to drive into the city. Military police set up roadblocks, but when the convoy arrived, they were told the missing man was safe. Retaliatory attacks on the Black barracks followed, resulting in firefights throughout Christmas Day. Eventually, the violence ceased, and several perpetrators received court‑martials.
3 Bloody Monday
In August 1855, Louisville, Kentucky, became a flashpoint for the Know‑Nothing Party—a radical, anti‑immigrant movement that targeted German and Irish newcomers. The party organized a “protect the polls” campaign, threatening violence to keep immigrants from voting.
That day, mobs of Know‑Nothing supporters attacked immigrant neighborhoods, firing weapons, smashing windows, and looting stores. Irish immigrants fought back, leading to gun battles throughout the city. Rioters set Irish homes ablaze in retaliation. Eventually, the city’s mayor—himself a Know‑Nothing—intervened, restoring order.
The bloodshed claimed 22 lives, yet no rioters faced criminal charges, and the city refused compensation for property loss. Only recently has Louisville erected a monument to honor those who perished.
2 Crown Heights Riot
The Crown Heights riot of 1991 erupted in Brooklyn after a motorcade carrying Jewish driver Yosef Lifsh crashed into two African‑American children. The accident sparked immediate retaliation: African‑American residents beat Lifsh and his companions, and rumors spread that emergency responders were favoring the Jewish victims.
Existing tensions between the predominantly Black and Caribbean community and the growing Orthodox Jewish population intensified. On August 20, 1991, violence surged, culminating in the murder of a Jewish man within three hours. Over the next three days, rioters targeted Jewish homes and businesses, with some outside participants, including Reverend Al Sharpton, amplifying anti‑Semitic rhetoric.
Police eventually restored order, making hundreds of arrests. Despite the upheaval, most Jewish residents chose to stay, and race relations between the two communities improved significantly in the aftermath, marking the incident as one of the most severe anti‑Semitic episodes in U.S. history.
1 1921 Tulsa Race Riot
Following World War I, Tulsa, Oklahoma, simmered with racial tension under strict Jim Crow laws. The catalyst arrived on May 31, 1921, when rumors claimed that Dick Rowland, an African‑American shoe shiner, had assaulted a white elevator operator. Police arrested Rowland, and whispers of a lynch mob spread.
That night, a white crowd stormed the courthouse, demanding Rowland’s surrender. Armed African‑American men gathered to protect him, but the first gunshot forced them to retreat to their neighborhood, Greenwood—later known as “Black Wall Street.” With the Tulsa police chief’s tacit support, a white mob armed itself and attacked Greenwood, igniting a night of fire and gunfire that razed roughly 40 city blocks.
Estimates suggest 100‑300 African‑American deaths and about 800 injuries, with the majority of casualties and destruction falling on the Black community. No perpetrators were convicted, and Rowland’s charges were eventually dropped. The tragedy remained hidden for decades, resurfacing only in recent years as a stark reminder of America’s violent past.
These ten episodes, though long forgotten by many, illuminate a pattern of racial hostility that has repeatedly scarred the United States. Remembering them helps us confront the legacies that still linger today.