He encamped outside the city and built siege works all around it.

Menno van Coehoorn, in a reversal of roles, directed the siege works against the city.

Montgomery concentrated his forces on improving the siege works.

The only ways to approach the siege works from outside were by causeways.

Comstock arrived at Vicksburg in June 1863 and set to work on improving the siege works.

He knew how sieges worked; the less the cops knew about what was going on inside the house, the better for him.

The defenders launched several sporadic attacks to obstruct the siege works.

If we fail today, we can begin the formal siege works on the morrow.

The Spanish, meanwhile, undertook several sorties to obstruct the siege works.

Cruger did what he could to interfere with the siege works, frequently sending out parties at night to harass the workers.