The acquisition of another state’s territory by force. Annexation is a unilateral act in which territory is seized rather than via cession (given or sold via a Treaty). Annexation can be legitimised via recognition from international bodies (such as intergovernmental institutions). In regards to annexation, the international community tends to abide by the Stimson doctrine. For instance, the Russian Federation was excluded from the G8 after the annexation of the Crimean Peninsula.