Which preposition to use with baku

to Occurrences 3%

The passage from Baku to Enzelli (the port of Résht) is usually made in a little over two days in fine weather.

on Occurrences 2%

I arrived in Baku on (the Russian)

across Occurrences 1%

Meanwhile, thousands of Russian troops, with cossacks and artillery, were pouring into northern Persia, from Tiflis and Julfa by land and from Baku across the Caspian, to the Persian port of Enzeli, whence they took up their 220-mile march over the Elburz mountains toward Kasvin and Teheran.

as Occurrences 1%

A French engineer, Mr. B, whose acquaintance I made at the hotel, described Baku as terribly monotonous and depressing to live in after a time.

Which preposition to use with  baku