Some countries practice forms of civil conscription for different major occupational groups or inhabitants under different denominations like "civil conscription", "civil mobilization", "political mobilisation" etc. This obligatory services on the one hand has been implemented due to long-lasting labour strikes, during wartimes or economic crisis, to provide basic services like medical care, food supply or supply of the defense industry. On the other hand this service can be obligatory to provide recurring and inevitable services to the population, like fire services, due to lack of volunteers.