TITLE: Seven Moments That Changed History: April 22
1. 1500 - Brazil Discovered by Europeans
On this day in 1500, Portuguese navigator Pedro Álvares Cabral sighted the coast of what is now Brazil, becoming the first European to set eyes on this vast territory. Cabral was actually en route to India when storms pushed his fleet westward, leading to this momentous accidental discovery. This encounter would reshape the entire South American continent. Portugal quickly claimed the territory, and Brazil would become the only Portuguese-speaking nation in the Americas. The discovery initiated centuries of colonization, the African slave trade to Brazil, and the exploitation of resources like sugar and gold that would make Portugal enormously wealthy. Today, Brazil stands as the fifth-largest country in the world by both area and population, and this April day in 1500 set in motion the events that created modern Brazilian culture—a unique fusion of Indigenous, Portuguese, and African influences.
2. 1864 - "In God We Trust" Authorized on U.S. Coins
The U.S. Congress passed legislation on April 22, 1864, authorizing the inscription "In God We Trust" to appear on American coins. This decision came during the Civil War, a period when Americans on both sides sought divine guidance and reassurance. The motto first appeared on the two-cent piece in 1864 and gradually expanded to other denominations. While it reflected the religious sentiments of the era, it would later spark debates about the separation of church and state. Nevertheless, "In God We Trust" became so embedded in American identity that in 1956, Congress declared it the official national motto. Today, every piece of U.S. currency bears these words, making it one of the most widely distributed religious statements in human history, seen billions of times daily by people around the world who handle American money.
3. 1889 - The Oklahoma Land Rush
At precisely noon on April 22, 1889, cannons fired and approximately 50,000 settlers charged across the border into what had been designated as "Unassigned Lands" in Oklahoma Territory. They raced by horse, wagon, train, and on foot to stake claims to parcels of free land in one of the most dramatic chapters of American westward expansion. The rush was chaotic and sometimes violent. So-called "Sooners" had illegally entered early to claim the best land, giving Oklahoma its nickname, "The Sooner State." By nightfall, entire tent cities had sprung up where empty prairie had existed that morning. Oklahoma City went from zero to 10,000 residents in a single afternoon. This event symbolized both the promise and the tragedy of Manifest Destiny. While settlers saw opportunity and freedom, the land had been taken from Native American tribes who had been forcibly relocated there just decades earlier, only to be displaced again.
4. 1915 - First Large-Scale Poison Gas Attack
The Second Battle of Ypres took a horrifying turn on April 22, 1915, when German forces released 168 tons of chlorine gas against French colonial troops. A greenish-yellow cloud drifted across no-man's-land, causing soldiers to choke, gasp, and die in agony—many before they even understood what was happening. This marked the first effective use of chemical weapons on a mass scale in warfare. The psychological impact was devastating, and it opened a Pandora's box that would see both sides deploy increasingly deadly chemical agents. Gas warfare would kill approximately 90,000 soldiers and injure over one million during World War I. The legacy of this April day led to the 1925 Geneva Protocol banning chemical weapons in warfare, though enforcement has been tragically inconsistent. The images of soldiers in gas masks became one of the defining symbols of the Great War's mechanized horror.
5. 1970 - The First Earth Day
Twenty million Americans—10% of the U.S. population at the time—participated in the first Earth Day on April 22, 1970, making it one of the largest organized demonstrations in human history. Organized by Senator Gaylord Nelson and activist Denis Hayes, the event raised public consciousness about environmental issues at a critical moment. Rivers were catching fire, smog blanketed cities, pesticides were decimating wildlife, and industries were dumping toxic waste with minimal regulation. Earth Day channeled growing environmental concerns into political action, leading directly to the creation of the Environmental Protection Agency and the passage of the Clean Air Act, Clean Water Act, and Endangered Species Act. The movement went global, and Earth Day is now observed in more than 190 countries. While environmental challenges remain urgent—particularly climate change—this first Earth Day established that ordinary citizens could mobilize to protect the planet, a legacy that continues to inspire activism today.
6. 1993 - U.S. Holocaust Memorial Museum Opens
The United States Holocaust Memorial Museum opened its doors in Washington, D.C., on April 22, 1993, providing America with its first national institution dedicated to documenting and teaching about the Holocaust. The opening ceremony was attended by Holocaust survivors, liberators of the concentration camps, and President Bill Clinton. The museum serves multiple purposes: it honors the six million Jewish victims and millions of other victims of Nazi persecution, it preserves the testimony of survivors while they're still alive to share their stories, and it educates future generations about the consequences of hatred and indifference. The museum's permanent exhibition takes visitors through the systematic persecution and murder orchestrated by the Nazi regime. Since opening, the museum has welcomed over 40 million visitors, including more than 10 million school children. Its archives contain evidence from the Nuremberg trials, thousands of survivor testimonies, and artifacts that bear witness to both the depths of human cruelty and the resilience of the human spirit.
7. 2016 - Paris Agreement Signing Ceremony
On April 22, 2016—chosen deliberately to coincide with Earth Day—representatives from 175 countries gathered at the United Nations to sign the Paris Agreement on climate change. This shattered the previous record of 119 signatures on an opening day for an international agreement, demonstrating unprecedented global unity on addressing climate change. The Paris Agreement committed nations to limiting global temperature rise to well below 2 degrees Celsius above pre-industrial levels, with efforts to limit it to 1.5 degrees. Each country submitted its own climate action plan, and the agreement included provisions for financial and technological support to help developing nations transition to clean energy. While implementation has faced challenges and some nations have wavered in their commitments, the Paris Agreement represents humanity's most ambitious attempt to collectively address an existential threat. The fact that it was signed on Earth Day's 46th anniversary creates a direct line from the grassroots environmental activism of 1970 to the global climate diplomacy of today.
Reflecting on April 22
These seven moments reveal how single days can alter the trajectory of civilizations. From accidental discoveries that reshaped continents to deliberate acts of cooperation that united nations, April 22 has witnessed humanity at its worst—deploying chemical weapons—and at its best—coming together to protect our shared planet. History connects us not just to our past, but to our responsibility for the future. Each of these events reminds us that the decisions we make today, whether as individuals or as nations, echo far beyond our own lifetimes.