Reading Chapter 10 Theory & Practice of the Bodhisattva Ideal, Section 7 2nd Para Page 37 of 119 telling that Bodhisattva in the 2nd Ground can be reborn as king in our world system.
Now referring to History of Indian Buddhism Module Unit 11 & 12 The Arising of Mahayana (Chapter 7 The Buddhism of King Asoka), we could see that King Asoka exhibited bodhicitta during the later part of his rein.
Here we see quite similarity between the two. The Gautama went on a schedule trip to see the suffering while Asoka went to war to see the suffering.
King Asoka fulfilled the above equations, so can we said that King Asoka was a Bodhisattva?