The rise of nationalism in Europe initiated with the Spring of Nations in 1848. ... Nationalism was the ideological impetus that, in a few decades, transformed Europe. Rule by monarchies and foreign control of territory was replaced by self-determination and newly formed national governments.
Yes, the Holocaust really happened.
There are still people who went through it and survived, alive today,
who have told their stories of it, thousands of times over.
And those who perpetrated it kept very detailed records of their own victims.
That the Schlieffen plan failed, The French were unable to defeat the Germans completely at the Battle of the Marne.
Spain and France where two countries that had settled in the present day Florida area before the pilgrims from Britain settled at Plymouth Rock.
I hope this helps!