<span>John Glover Roberts Jr. (born January 27, 1955) is an American lawyer who serves as the 17th and current Chief Justice of the United States. He took his seat on September 29, 2005, having been nominated by President George W. Bush after the death of Chief Justice William Rehnquist</span>
Answer:
Mainly Trench Warfare was popularized by the use of new mechanized weapons such as Artillery, and also because of the mass victories in the east on germany's side, Russia used these as a form of slowing them down and to protect their troops, but often these trenches hurt these men by disease, starvation, etc.
You don't show options, so here are the different definitions
1. "the study of past events, particularly in human affairs."
2. "the whole series of past events connected with someone or something."
3. "a continuous, typically chronological, record of important or public events or of a particular trend or institution."
