The Medinan Empire's fighting prowess was proved after the Arabian Unification Wars. The war proved the Arabic way of fighting to be supremely effective. The Byzantine Emperor, Constans III, had already sent an alliance offer to Medina as early as 632. However, Fatimah I, afraid that the pagan tribes in Arabia would revolt in the case she went away in another war, declined Constans' deal. This lead to the antagonisation of Constans and Fatimah.