The Ottomans controlled the Caucasus region entirely or partially from the '1400s' through the end of World War 1.
Explanation:
The Ottomans built one of the strongest empires in the history of the world and ruled for over 600 years.
The Caucasus region comprising of present-day Azerbaijan, Armenia, Georgia and northeastern parts of Turkey served as the battleground between the Persian and the Ottoman forces for a prolonged period.
During this conflict, the Ottomans gained and lost their control over the region several times.
