Napoleon, Augustus Caesar, Leonardo Da Vinci, Rishi Agastya are some of the known Vibhitis of Sri Aurobindo whereas Joan of Arc, Queen Catherine the great of Russia, Hatsheput in Egypt, Saint Mirabai are known Vibhutis of the Mother.
Gandhi and Aurangzeb were not Vibhutis. Aurangzeb and Dara did come to the Ashram in their present life but the former left after some time. Gandhi and Churchill were instruments for the Divine Purpose, both generally not conscious of the forces working through them.
There is no one place from where one can read these things.
If you have a strong inner conviction that you were with the Mother, then there is a great likelihood that you were. The final confirmation may come through a dream or declare itself in a vision or other forms of disclosure.
Affectionately,
Alok Da
