Aden was captured and annexed to British India on 16 January 1839 by a combined miltary and naval force. In 1839 the population was less than 1,000 and by 1901 it had grown to some 44,000
From 1854 to 1937 stamps of India were used in Aden
Most Indian stamps from the 1854 issue up to the 1935 issue can be found with Aden postmarks. These can be recognized by the word ADEN appearing in the postmark or from the numerals 124, 125 or B-22 which were used on their own or in a duplex with an ADEN datestamp.
From 1937 till 1964 Aden issued its own stamps.
In 1965 Aden was incorporated in the
South Arabian Federation.
In 1967 the South Arabian Federation became fully independant to become the
Yemen People's Democratic Republic.