Complex sentence: He wanted to get into the Navy for an easier life, but his reserved-occupation status Workers in some industries, such as munitions, farming and mines, were often considered too valuable at home to be allowed to fight abroad.
Split into simpler sentences: He wanted to get into the Navy for an easier life, but his reserved-occupation status was a problem. Dispensation from military enlistment was given to workers in'Reserved-occupations', those industries, such as munitions, farming and mines, often considered too valuable at home to be allowed to fight abroad.