what were the lines of defence dug into the earth?

and what was willsons plan for peace?

trenches

http://www.historylearningsite.co.uk/woodrow_wilson1.htm

To find information about the lines of defense dug into the earth, you can search for historical references related to defensive structures and military tactics. A recommended approach would be to search on credible historical websites, military history archives, or reference books. Let's explore further.

1. Start by searching for keywords related to historical defensive structures and tactics, such as "trench warfare" or "defensive lines in history."
2. Visit reputable historical websites, such as National Archives or military history museums, that provide comprehensive information on this topic.
3. Consult reference books on military history or warfare strategies, as they often include detailed descriptions of defensive structures throughout different eras.

Regarding Woodrow Wilson's plan for peace, it is commonly known as the "Fourteen Points." To understand the details of this plan, you can follow these steps:

1. Begin your search by entering "Woodrow Wilson Fourteen Points" in a search engine.
2. Look for official sources, such as historical government websites or reputable academic sources, that provide information about this plan.
3. Explore the results from reputable universities or online libraries to find scholarly articles or books discussing Wilson's Fourteen Points in detail.
4. For a concise overview, you can also consult reputable encyclopedias or even educational videos dedicated to explaining the plan.

Remember to critically evaluate the sources you come across, giving preference to reliable and authoritative references.