It is recommended but it’s not a necessity
These two men seated at the table represent the Irish , with top hat and vest, and German (smoking pipe and drinking german beer) inmigrants in the 1800s in the US. The cartoon refers to the 1882's Chinese Exclusion Act, which was the first American law preventing the inmigration of an specific ethnic/national group. This can be apreciated in the "New Declaration of indepence" at the back of the cartoon.
The legend in the bottom ("If the Yankee Congress can keep the yellow man out, what is to hinder them from calling us green and keeping us out too?") refers to the raising fear in Irish and German groups of facing the same fate of Chinese inmigrants. This let us know American attitude towards inmigrants who weren't seen as equals and were discrimitated for their origins and skin color.
The missile launch crisis
C. wanted to establish a French Republic.
The radicals in France wanted to overthrow the monarchy and establish a republic form of government to mimic that of the United States.
Moderates believed a republic was too far of a leap for a country with the tradition of monarchy. They wanted to create a parliamentary system like Great Britain that would maintain a monarchy and have representation. Conservatives wanted to maintain the monarchy and as a result were often the target of the radical government. Robespierre and the Jacobins launched a government meant to be a republic which turned into a dictatorship filled with bloodshed at the blade of the guillotine.