Controlling every step of production for a single product (best represented by Andrew Carnegie's steel business).
What is vertical integration?
The U.S. military's strategy for victory in the Pacific during WWII.
What is island hopping?
Domino Theory, the Gulf of Tonkin Resolution, and the Tet Offensive are all connected with this conflict.
What is the Vietnam War?
This president was the second president ever to be impeached.
Who is Bill Clinton?
The 16th president of the United States.
"Yellow dog contracts" were used by businesses to limit the influence of these organizations.
What are labor unions?
The image above was linked to this sensationalized trial in the 1920s.
What is the Scopes (Monkey) Trial?
While the Berlin Wall was the source of much controversy in the 1960s, Berlin was also the source of this earlier Cold War standoff in 1949.
What is the Berlin Blockade/Airlift?
This president was the third president to be impeached.
Who is Donald Trump?
This doubled the size of the continental United States.
What is the Louisiana Purchase?
We have the railroad industry, not the government, to thank for creating four of these for the entire country.
What are time zones?

The novel pictured above led to the passage of this federal regulatory law (and almost convinced Teddy Roosevelt to become a vegetarian).
What is the Pure Food and Drug Act?
This landmark supreme court case overturned the "separate but equal" ruling of Plessy v. Ferguson.
What is Brown v. Board of Education?
While the Soviet Union stuck around for a bit longer, the collapse of this structure is often seen as a symbolic end to the Cold War.
What is the fall of the Berlin wall?
Trust-busting Bull Moose.
Who is Teddy Roosevelt?
The NYC-based political machine being satirized in this political cartoon.
What is Tammany Hall?
December 7th, 1941 is forever known as a "day which will live in infamy" due to this event.
What is Pearl Harbor?
The leaking of these documents to the New York Times confirmed many Americans' suspicions that the government was lying to them about Vietnam.
What are the Pentagon Papers?
This terrorist organization claimed responsibility for the 9/11 attacks.
What is Al Qaeda?
War instigated by President James K. Polk.
What is the Mexican-American War?
President Arthur passed this major reform law in 1883 to curtail patronage/the spoils system's influence on federal jobs.
What is the Pendleton Civil Service Act?
This WWI-era supreme court decision led to a rare restriction on first amendment rights, stating that your freedom of speech can be limited if it creates a "clear and present danger."
What is Schenk v. United States?
This strategy helped Nixon and the Republicans win the presidency in 1968 by courting former Democrats who left the party over civil rights issues.
What is the southern strategy?
Ronald Reagan was criticized for his lack of response to this health crisis in the 1980s.
What is the AIDS epidemic?
What is four?