Achaemenid invasion of Indus valley is the
Achaemenid military conquests of territories of
South Asia west of
Indus river in 6th century BC, consisting mainly of modern-day
Pakistan. Achaemenid penetration into the modern
Pakistan occurred in stages, starting from northern parts of Indus river and moving southward. The
Persian empires considered the
Indus river as their eastern most boundary.