envelopment

Envelopment is the military tactic of seizing objectives in the enemy's rear with the goal of destroying specific enemy forces and denying them the ability to withdraw. Rather than attacking an enemy head-on as in a frontal assault an envelopment seeks to exploit the enemy's flanks, attacking them from multiple directions and avoiding where their defenses are strongest. A successful envelopment lessens the number of casualties suffered by the attacker while inducing a psychological shock on the defender and improving the chances to destroy them. An envelopment will consist of one or more enveloping forces, which attacks the enemy's flank(s), and a fixing force, which attacks the enemy's front and "fixes" them in place so that they cannot withdraw or shift their focus on the enveloping forces. While a successful tactic, there are risks involved with performing an envelopment. The enveloping force can become overextended and cut off from friendly forces by an enemy counterattack, or the enemy can counterattack against the fixing force.

Ein Briefumschlag (auch: Kuvert oder in der Schweiz Couvert, veraltet Enveloppe) ist die Versandverpackung eines Briefes.

• Envelop (briefomslag)
• Envelope, omhullende of envelope van een synthesizer
• Gascel van een luchtballon of luchtschip
• Enveloppe (vesting), een onderdeel van een vestingwerk

Une enveloppe, en papeterie, est un pliage que l'on peut sceller, destiné à contenir un courrier pour le protéger, notamment des regards indiscrets lors du transport, et sur laquelle on place l'affranchissement. On utilise également dans ce contexte le terme de « pli » pour désigner l'enveloppe et son contenu.

Koperta – płaskie, zazwyczaj papierowe opakowanie, przeznaczone do przesyłania listów, kartek pocztowych lub innych przesyłek pocztowych.