Minefield

A minefield is the deployment of a large number of mines within a certain area.

Prior to the start of the Dominion War, Starfleet placed a minefield at the mouth of the Bajoran wormhole to prevent Dominion reinforcements from entering the Alpha Quadrant. 

After over three months of fighting the Dominion was successful at destroying the minefield at the mouth of the wormhole. However, the intervention of the Prophets stopped the arrival of Dominion reinforcements. (: "Into the Fire")

While battling the Dominion on a Federation planet Captain Rachel Daley had her company lay a minefield between a town and the approaching Jem'Hadar to slow their advance.