What is an example of a maneuver where the main attacking force circumvents the enemy's defensive positions?

A maneuver where the main attacking force circumvents the enemy's defensive positions is known as an envelopment. This tactic involves a coordinated movement to surround and cut off the enemy, aiming to gain a significant tactical advantage by attacking from multiple directions. An envelopment typically seeks to avoid a head-on confrontation with fortified defenses, instead striking at the rear or flanks, where the enemy may be more vulnerable.

In contrast, while frontal assaults and direct approaches involve engaging the enemy directly, they do not focus on bypassing defenses strategically. A flanking maneuver does involve attacking an enemy's flank but may not necessarily encompass the broader approach and encirclement described in an envelopment. Therefore, the envelopment maneuver is the most effective example of circumventing enemy defensive positions, demonstrating a higher level of tactical sophistication in combat situations.