What happened on this land around c. 1800–1815 CE (early Qajar era)?

Increasing Russian pressure in the Caucasus and the loss of territories; diplomatic and military challenges against imperial powers.
Rulers
Qajar dynasty
1794–1925 CE
Qajars rule Iran; deal with Russian and Ottoman pressures in the Caucasus and west.
Battles
Russo-Persian War (1804–1813)
1804–1813
Conflict resulting in territorial losses in the Caucasus for Iran under the Treaty of Gulistan.