All angels, whether good or bad, are organized for service and effectiveness. Michael is called an archangel (Jude 1:9), a chief prince (Dan 10:13), and is assigned the task of guarding Israel (Dan 12:1). Gabriel is a messenger angel who was sent to deliver important messages to God’s people (Dan 8:16; 9:21-22; Luke 1:19; 26-38). Both Michael and Gabriel are recorded in Scripture as battling fallen angels who appear as commanders of regions of the world (Dan 10:12-13, 21). One fallen angel is called “the prince of Persia” and the other “the prince of Greece” (Dan 10:20). These no doubt function as Satan’s emissaries to promote his purposes, and are part of a larger group that Paul called the forces of darkness (Eph 6:12).