Civil war in what middle eastern country in the early 1980s brought syria, the plo, and israel into conflict and resulted in the death of 283 american marines?

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.