A tachanka was a horse-drawn cart or an open wagon with a heavy machine gun mounted on the rear side. A tachanka could be pulled by two to four horses and required a crew of two or three.
Tachankas turret used in WWI.
Tachanka armed with a PM M1910 in the Huliaipole museum
Polish taczanki at an Independence Day parade in 1938
A horse-drawn vehicle is a piece of equipment pulled by one or more horses. These vehicles typically have two or four wheels and were used to carry passengers or a load. They were once common worldwide, but they have mostly been replaced by automobiles and other forms of self-propelled transport but are still in use today.
A horse tram (horsecar) in Danzig, Germany (present day Gdańsk, Poland)
Cart - Two wheels, one horse
Chariot - Two wheels, two or four horses, driver usually standing
Carriage - Four wheels