Indian postal systems for efficient military and governmental communications had developed long before the arrival of Europeans. When the Portuguese, Dutch, French, Danish and British conquered the Marathas who had already defeated the Mughals, their postal systems existed alongside those of many somewhat independent states. The British East India Company gradually annexed the other powers on the sub-continent and brought into existence a British administrative system over most of modern-day India, with a need to establish and maintain both official and commercial mail systems.