The assassination of Archeduke Franz Ferdinand of Austria and misunderstanding in diplomatic communications.
The best statement regarding the Alien and Sedition Acts would be that "<span>(C) The acts were passed to protect John Adams from his critics," but a better option would be that they were thought to protect the federal government as a whole--not just the President (Adams). </span>
I believe the answer is The Vietnamese fought for independence (from the French) while South Africans fought for racial equality.
Mexico was much friendlier to Americans settling in Texas than Spain had been.