This statement is FALSE.
The European Union is constituted by 28 member states, and not all of them are republics. For example, Spain, Belgium and the Netherlands are constitutional monarchies.
It is not a partnership but a form of supranational integration. The level of integration is not as deep as the one that can be found in a federal country like the US. Its member states have established a common market, free movement of people and goods, a common currency, common foreign policy and even certain levels of political integration. Many other aspects such as the fiscal policy, are decided at the state level and the EU has no authority over them.
In the city of Philadelphia, Pennsylvania.
The native Americans, Europeans, and west Africa. Hope that helps
Two groups of Celts from southern Europe invaded the British Isles. The Brythons (Britain) settled on the largest island, Britain. the second groups was called the Gaels; they settles on the second largest island, now called Ireland. The Celts were farmers and hunters.
Yes, lack of foreign conflict for close to 100 years until world war 1 which is a sign of its success.