The U.S. Army designated small bodies of armed Mexicans who fought an irregular war against the Americans as guerrillas.. Guerrilla, a term based on the Spanish word for small war, was initially used during Napoleon's Peninsula War, 1808-14, to describe Spanish irregulars fighting the French.
Condensation is the formation of liquid drops of water from water vapor. It is the process which creates clouds, and so is necessary for rain and snow formation as well. Condensation in the atmosphere usually occurs as a parcel of rising air expands and cools to the point where some of the water vapor molecules clump together faster than they are torn apart from their thermal energy. A very important part of this process is the release of the latent heat of condensation.
1 The evaporation and subsequent collection of a liquid by condensation as a means of purification: the distillation of water.  The extraction of the volatile components of a mixture by the condensation and collection of the vapors that are produced as the mixture is heated: petroleum distillation.