Complex sentence: In 1801, the entire region of Lori became part of the Russian Empire along with the Georgian state, a fact that made Lori one of the strategically important territories for the Russian defensive forces on the border against Persia.
Split into simpler sentences: In 1801, the entire region of Lori became part of the Russian Empire along with the Georgian state. Lori was a strategically important territory for the Russian defensive forces on the border against Persia.