Campanian
The Campanian is, in the ICS' geologic timescale, the fifth of six ages of the Late Cretaceous epoch (or, in chronostratigraphy: the fifth of six stages in the Upper Cretaceous series). The Campanian spans the time from 83.6 ± 0.7 Ma to 72.1 ± 0.6 Ma (million years ago). It is preceded by the Santonian and it is followed by the Maastrichtian.
Caucasian Albania
According to one hypothesis, Caucasian Albania was incorporated in the Median empire, as early as the 7th or 6th century BC. However, an increasing Persian influence on the region is usually believed to be connected with the defence of Persia's northern frontiers, from invading nomads. As early as the Achaemenid empire, measures may have been taken to fortify the Caucasian passes. By the mid-6th century BC, Albania has been incorporated in the Achaemenid empire; it was later controlled by the Achaemenid satrapy of Media. The building of fortifications and gates in and around Darband is traditionally ascribed to the Sassanid empire.