National defence facilities include Canadian Armed Forces bases, training areas, and installations located within or near municipalities across Canada. These facilities are federal jurisdiction, exempt from municipal property taxes, though the federal government makes payments in lieu of taxes (PILT) to compensate municipalities. Military bases significantly impact host communities through employment, housing demand, service requirements, and economic activity. Base closures or expansions affect local economies substantially. Municipalities hosting military facilities must coordinate emergency planning, address noise and training impacts, and plan for transient military populations. Positive relationships between bases and communities benefit both through cooperation and mutual support.