In the war of 1812 around 243,885 people fought on behalf of Canada
In short, Libertarians believe the government should never violate an individuals rights (socially liberal), and should be extremely limited its power, especially in regards to the economy (economically conservative).
Carried forward, Libertarians generallysupport gay rights, a woman's right to choose ("pro-choice"), and an individuals privacy (opposed to the Patriot Act, and to a degree also opposed to the CIA). Anything that expands the individuals' rights, Libertarians support.
Economically, Libertarians generally believe that Capitalism should be unregulated. There are some blatant problems with monopoly and scams (i.e. Ponzi schemes), and a certain number of Libertarians believe there ought to be some regulation.
In a similar vein, Libertarians generally are opposed to the power of the monopoly called government. As a political philosophy, Libertarians believe the government should exist only to protect the liberties of its citizens. A strong military is acceptable, but Libertarians favor the philosophy of the founding fathers - nonintervention.
These "policies" are only as I understand them, and should not be taken as representative of all Libertarians.
Plessy v. Ferguson, 163 U.S. 537 (1896), was a landmark decision of the U.S. Supreme Court that upheld the constitutionality of racial segregation laws for public facilities as long as the segregated facilities were equal in quality
Poverty spread during the Great Depression, because of skyrocketing prices of needed things, which led to people not being able to take care of themselves
hope this helps