Every Space Marine Chapter sends a number of its warriors to Mars where they are inducted into the Machine Cult by the Adeptus Mechanicus. Aspiring Techmarines train for years, steeping themselves in rites of activation, maintenance and repair. Upon returning to their Chapter, they are Space Marines of dual loyalties, pledged by blood to their Chapter, but bound in mind to the Omnissiah. Despite this dichotomy, Techmarines are held in great esteem; a Chapter could not wage war without its technological tools. In spite of their mysterious calling, Techmarines remain fierce warriors, and if a vehicle is lost, they will fight for its retrieval as stridently as their brethren would to recover any other fallen comrade.