vice manoeuvre

1: A military manoeuvre intended to put stress on an enemy's defences.

2: A military manoeuvre intended to surprise an enemy

1: The general decided to do a traditional vice manoeuvre, quickly splitting his troops up in two equal sizes and ordering them to attack from two polar flanks.

2: It was night and the general decided to take the enemy base by surprise. He split up his troops in one smaller and one bigger size and ordered the smaller part to attack from the left flank while the bigger part prepared to take over the battlements from the right flank.