I received a notice from the army on the 24th of this month. Why were veterans recalled to the Ministry?

Many people yearn for the military career, because the life of the army is enough to completely change a person from the inside out. Soldiers not only bear the responsibility of defending the country, they are more people's spiritual sustenance. Because where they are needed, they will be there. For some soldiers who have to bid farewell to the army, the inner disappointment and regret can't be described in words. It is their greatest wish to return to the army again. So, is it possible for veterans to be recalled?