The short answer: Murdering an individual for political purposes is an Assassinations.
Murder in general is the unlawful killing of one human by another, especially with premeditated malice.
Assassinations in general are considered by international law experts as the murder of a targeted individual for political purposes, usually involving circumstances of a covert or "treacherous" nature. Whether the intended killing of an individual counts as an assassination or as a generally acceptable military operation depends on whether the relevant countries are at peace or war, the forces carrying out the killing, and the means by which the killing is carried out.
