No they didn't bring popcorn to the first Thanksgiving, although they did bring corn.
Many slaves died during the middle passage due to the fact they were chained together in boats and were exposed to disease infection and were rarely fed
Many items were purchased. I think
The agreement was the unanticipated fruit of an attempt by the French Foreign Minister, Aristide Briand, to negotiate a bilateral treaty with the United States in which each nation would renounce the use of war as an instrument of policy toward the other.