Akbar was accorded the epithet "the Great" because of his many accomplishments, including his record of unbeaten military campaigns that consolidated Mughal rule in the Indian subcontinent. The basis of this military prowess and authority was Akbar's skilful structural and organisational calibration of the Mughal army.
In return for the money, the United States got Texas, California, New Mexico, and large areas of Arizona and Nevada. This was great for them because it worked well with the manifest destiny idea and it enabled them to get to the western coast.