What event of the mid-1900s greatly contributed to increased cooperation between european nations?

Before world war 1 started, austria-hungry was wary of (spain or serbia) because of border disputes

Which french colony used the french revolution as inspiration to gain its own independence? a. brazil b. nicaragua c. haiti d. honduras e. ecuador

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.