In 1930, the customs duty comprised about .....…… of the total national income in Bahrain.

Bahrain's trade flourished exceptionally in the middle of the first decade of the twentieth century where the value reached more than three million pounds.

The Gulf region was transformed during the WW 1 into a battlefield between the great powers.

After the middle of the 19th century AlZabara became one of the most important commercial centres in the Gulf.

Bahrain's trade began a swift incline at the end of the 1830s due to the stability in Bahrain. 

The first customs system was established in Bahrain in .......... 

In the two first decades of the 19th century the Gulf region was characterised by its stability until British rule was established when the agreement of 1820 was imposed on the Omani coast.

During 1824 Bahrain's exports depended mainly on the export of .........  to the various regions.

In 1824, the majority of Bahraini commodities were exported to ......

The geographical position of Bahrain formed a barrier between India and Mesapotamia in the past.