On completion for this task, Allard was awarded the rank of General, and became the leader of the European officer corps in the Maharaja's service.

While serving under Maharaja Ranjit Singh, he fell in love with Princess Bannu Pan Dei from the area that is now Himachal Pradesh.

In 1835, Allard returned to his hometown Saint-Tropez along with his wife and built "Pan Dei Palais" to commemorate their love.

They were joined four years later by the Neapolitan Paolo Di Avitabile, and the Frenchman Claude August Court.

[citation needed] He was an amateur numismatist, and contributed greatly to the early study of Ancient Indian coins.