which phenomenon in the late 19th and early 20th centuries contributed to a change in the data on this map?

June 19 is often a holiday in texas. it is emancipation day. what important event happened on emancipation day? a) it marks the end of slavery in texas. b) it marks end of the texas revolution. c) it marks the day texas became a state. d) it marks the last battle of the texas revolution.

The mongols were descendants of a. pastoral nomadic tribes b. tibetan tribes c. shang nobility

Historians sometimes rely on video recordings in researching past events because