During the war the fort's river batteries were close to the river, but since the war erosion factors have caused the river to move two miles west.
(the fort's river batteries; were; close to the river; T:During the war) (the war erosion factors; have caused; the river to move two miles west)
the fort's river batteries the war erosion factors
were have caused
close to the river T:During the war
the river to move two miles west