What does the x-axis of this line graph represent?

1. discovered the new world balboa 2. explored the north american southwest hudson 3. his crew was the first to sail around the world vespucci 4. conquered the incas of peru cortes 5. discovered the pacific ocean columbus 6. conquered the aztecs of mexico cabot 7. discovered fishing grounds off newfoundland pizarro 8. looted spanish vessels for england drake 9. claimed the hudson river area for dutch coronado 10. priest who explored the mississippi marquette 11. man for whom the new world is named magellan

What is domino theory? how did domino theory impact the us involvement in the vietnam war

In one or two sentences, summarize the author’s thesis statement about the equal rights amendment (era). how does this article excerpt give you a better understanding of the political difficulties that faced era proponents in the mid- and late 1970s?