It's some Halloween tradition to say "Trick or Treat" for candy when you knock on someone's front door. :D
They needed more land build homes and start a fresh goverment
The U.s. really hates Commuism
Farmers who had settled in East Texas, rather than Panhandle or West Texas, had the advantage of a relatively moist climate that could support a variety of crops. Also, their land had good access to rivers and streams.