When were border guards/posts abolished between western European countries?
When were border controls/ guards abolished between Schengen countries?
What was the era of dual federalism? What countries were involved? How important are the borders between countries? Why do they even exist? What military restrictions still apply to Germany? What would happen, short- and long-term, if all countries opened their borders? Why is the international border with China not fenced? What are the international borders of Mexico? Are there really parts of the US–Canada border that are unprotected, such as this one? What countries did France colonize? In which European country would waving a flag of that country in public be considered offensive or out-of-place? What led Europeans become so open minded and respecting human rights and equality? What other countries should learn from them? Where and how are laws made in France? Should border cities inter-mingle with neighboring states? Why does it seem that the expansion of the United States from 1783 was allowed to be completely unchecked by European powers? Is it time for national flags to get abolished? How many jobs would increased border security and a border wall being built make? Who draws out city and state borders? How has immigration changed Europe? What were the causes of Nationalism in Europe? What influence did France have on Vietnam and Indochina during its colonization? On what basis were some countries given UNSC veto power? Why did European countries colonise the world and not other countries? How did Germans deal with antisemitism after WWII ended? Who enforces the Geneva convention? What are the points of conflict between the European Union & Greece? What would happen if all the countries in the world have open borders? Why does Quebec have such strict laws protecting its use of Québécois French? What were the events that caused the French Revolution? What would be the effects of the formation of a European Federation? Which members of the European Commission have power to create new laws? And how are these members selected? How can European governments solve the problem with integration of Roma / Romani / Gypsies?