A military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.
The breaching of the skin barrier.
The spread of cancer cells, bacteries and such to the organism.
The entry without consent of an individual or group into an area where they are not wanted.
The act of resisting, or the capacity to resist.
An underground organisation engaged in a struggle for liberation from forceful occupation; a resistance movement.
A force that tends to oppose motion.
electrical resistance.