The first link is about a different incident. During WWII, the Allies were concerned about the possibility of Iranian oil falling into the hands of the Nazis, and they also wanted to set up a supply corridor to connect themselves, so when the Iranian king that Britain had installed refused to cooperate, they invaded, deposed him, and instituted his son in his place. However, the monarchy was still bound by parliament at the time, until the US overthrew the prime minister and granted the shah absolute power, accountable to no one.
I didn’t expect to find an unironic monarchist on here. It’s true that he instituted some programs over the course of his 37 year reign, but they weren’t nearly enough, the country was still a dictatorship and people were very unhappy with living under his rule.