The early church had recognised the orders of bishop, presbyter (priest) and deacon, but a range of minor orders had since grown up in addition; and all were tonsured. These orders now tended to be understood as clerical 'ranks', equivalent to those in the military, such that the male clergy are now often referred to as a "clerical militia". And as in the Roman military or civil service, promotion was expected to follow the principle of cursus honorum, rising through the ranks, with the expectation that ideally, a minimum period would be served in each.