A unitary system of government, or unitary state, is a sovereign state governed as a single entity. The central government is supreme, and the administrative divisions exercise only powers that the central government has delegated to them.
So, preventing an infestation of ants or getting rid of ants is a matter of closing entry points, repelling them, and practicing daily routines of cleanliness. 1  Follow them. 2  Close gaps and/or apply natural repellents those entry ways.  Practice cleanliness and routine maintenance.
As previously mentioned, hot water and soap gets rid of ants fairly well so if you are lucky enough to find the ant nest or ant hole, pour some of that into it! Depending on the size of the nest, this can often kill the entire ant colony, including the queen ant which will ensure that the ants leave you in peace.