Britain entered World War I in 1914 to honor a treaty that promised to defend Belgium and to fulfill an alliance with France and Russia. The Germans attacked Liege, Belgium, in the first battle of World War I, and then marched on to attack France.
I'm assuming by "war" you mean World War I
Tariff is a tax on goods leaving or entering the country
"The southern states have been conquered and should be punished for their actions".
We are doing this one in school.
The radical republicans were about justice, not healing. They wanted equal rights for blacks, to continue the freedman's bureau, and to punish the south. This was during the years of congressional reconstruction, 1865-1867. President Andrew Johnson was more into healing the country (as he was racist), during the years of 1864-1865.
First of all, the Spanish (along with the rest of the large European countries at the time) had guns and other military technology. With the advantage of having gunpowder, the Spanish were able to relatively easily conquer the indigenous peoples in the Americas. Another point is the Spanish military training; the American civilizations had no military training that matched the strict codes of the European countries, so the precision of the Spanish helped them conquer.
