Why was the U. S. Army unable to stop Native American raids in West Texas soon after the Civil War?

too few troops posted at forts in west Texas. ... The Native Americans had several different bands within their tribe and not all leaders signed the treaty, so they felt they didn't need to abide by it.

can you attach the answer options

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion