 As per Rome Statute of the International Criminal Court War crime means :
(a) Grave breaches of the Geneva Conventions of 12 August 1949, namely, any of the following acts against persons or property protected under the provisions of the relevant Geneva Convention:
(i) Wilful killing;
(ii) Torture or inhuman treatment, including biological experiments;
(iii) Wilfully causing great suffering, or serious injury to body or health;
(iv) Extensive destruction and appropriation of property, not justified by
military necessity and carried out unlawfully and wantonly;
(v) Compelling a prisoner of war or other protected person to serve in
the forces of a hostile Power;
(vi) Wilfully depriving a prisoner of war or other protected person of the
rights of fair and regular trial;
(vii) Unlawful deportation or transfer or unlawful confinement;
(viii) Taking of hostages.  Read more
Grave Breaches of the Geneva ConventionsÂ
War crime of wilful killing
War crime of torture
War crime of inhuman treatment
War crime of biological experiments
War crime of wilfully causing great suffering
War crime of destruction and appropriation of property
War crime of compelling service in hostile forces
War crime of denying a fair trial
War crime of unlawful deportation and transfer
War crime of unlawful confinement
War crime of taking hostages
Other Serious Violations in International Armed Conflict
War crime of attacking civilians
War crime of attacking civilian objects
War crime of attacking personnel or objects involved in a humanitarian assistance or peacekeeping mission
War crime of excessive incidental death, injury, or damage
War crime of attacking undefended places
War crime of killing or wounding a person hors de combat
War crime of improper use of a flag of truce
War crime of improper use of a flag, insignia or uniform of the hostile party
War crime of improper use of a flag, insignia or uniform of the UN
War crime of improper use of the distinctive emblems of the Geneva Conventions
War crime of the transfer, directly or indirectly, by the occupying power of parts of its own civilian population into the territory it occupies, or the deportation or transfer of all or parts of the population of the occupied territory within or outside this territory
War crime of attacking protected objects
War crime of mutilation
War crime of medical or scientific experiments
War crime of treacherously killing or wounding
War crime of denying quarter
War crime of destroying or seizing the enemy’s property
War crime of depriving the nationals of the hostile power of rights or actions
War crime of compelling participation in military operations
War crime of pillaging
War crime of employing poison or poisoned weapons
War crime of employing prohibited gases, liquids, materials or devices
War crime of employing prohibited bullets
War crime of employing weapons, projectiles or materials or methods of warfare listed in the annex to the Statute
War crime of outrages upon personal dignity
War crime of rape
War crime of sexual slavery
War crime of enforced prostitution
War crime of forced pregnancy
War crime of enforced sterilisation
War crime of sexual violence
War crime of using protected persons as shields
War crime of attacking objects or persons using the distinctive emblems of the Geneva Conventions
War crime of starvation as a method of warfare
War crime of using, conscripting or enlisting children