Iron occurs in three different regions placed by different mechanisms.

Finally, on 1 June 1903, with the Okrug of Artvin, it was established as the region (oblast) of Batumi placed under the direct control of the General Government of Georgia.

Emigration was especially directed to the factories of the so-called "industrial triangle", the region placed between the major manufacturing centres of Milan and Turin and the seaport of Genoa.

During the Croatian war of Independence, most of Dalmatia was a battleground between the Croatian government and local Serb rebels, with much of the region being placed under the control of Serbs.

Caravanserais dotted the major trade routes across the region, placed at intervals of a day's travel.

The fifth and final d-orbital consists of three regions of high probability density: a torus with two pear-shaped regions placed symmetrically on its z axis.

This tension culminated in the 1950s with the Mau Mau rebellion; it saw the region placed under a state of emergency and the arrest of many prominent political leaders.