Result of the peace treaty ending the 30 years war

What is one example of trench warfare ?

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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.

Name 3 significant impacts of the tet offensive on the outcome of the war, it's participants, or the public image of the war.