More on the firing of General McChrystal natal and REGULUS the fixed star:

Neptune was Transiting opposed to Regulus and  at 28 degrees Aquarius and conj. TR Chiron.
This means that Neptune was undermining in hit's transit the placement that conjoins Regulus, to bring about the sorrow or inner wounding that Chiron would represent to General McChrystal in his rebuke by President Obama.

Regulus is located at this time tropical position 28Leo which is opposite to 28Aquarius.

We use both conjunctions and Oppositions in Fixed Star work, transits and natal charts and in his case, certainly Chiron is quite appropriate to see for this General as he did save face by retiring from his command, just as the ancients point to.

Regulus is termed the Persian "King Star" and the fall is usually short and quick. They climb back up again after the transit or progression to reflect the temporary fall from grace.