In-Universe:
The U.S.S. Defiant and Federation fleet stand ready to meet the Dominion fleet.
Production:
The CGI model of the Defiant was created by Digital Muse and all the space battle shots were LightWave CGI, no physical models were used. Since there were so many FX shots for the episode Sacrifice of Angels the CG modeling was done by both Digital Muse and Foundation Imaging. Digital Muse built the Starfleet ships, which was mostly the first half of the show, and Foundation Imaging Handled the Dominion ships, etc.
- Sci-Fi & Fantasy Models 32 (Page 53) & Google Groups Forum