I don't think he did it largely for personnel gain. I do think he personally gained but look at every political decision ever made. There are winners and losers. Almost none of them are 100% based on altruism. How does any Senator enter government with a net worth of a 100k and 5 years later is worth millions on a salary of 174k while supporting 2 households (DC and home state). All of them grift. All of them vote for things that end up killing or harming people. That is the nature of government and the nature of military super powers.

Don't get me wrong, I am not suggesting he was a good person just that he was a person.