In amical protection as of United States of the Ionian Islands by Britain, the terms are often very favourable for the protectorate. The political interest of the protector is frequently moral (a matter of accepted moral obligation, prestige, ideology, internal popularity, or dynastic, historical, or ethnocultural ties). Also, the protector's interest is in countering a rival or enemy power such as preventing the rival from obtaining or maintaining control of areas of strategic importance. This may involve a very weak protectorate surrendering control of its external relations but may not constitute any real sacrifice, as the protectorate may not have been able to have a similar use of them without the protector's strength.