Operation Remembrance is a massive expansion and realism mod for EA's Battlefield: Vietnam. Operation Remembrance has been created by Denal Douglas, a private mod-maker, and has been in the works for almost nine years. It adds dozens of maps, small arms, weapons emplacements, aircraft, land vehicles, and naval vessels, as well as significant improvements to the AI, making singleplayer more fun and more challenging.
A quick video showcasing the new deployable barbed wire tool, which will be available to the "Engineer" class in the next update of Operation Remembrance, and the Bangalore Torpedo, for destroying barbed wire, which will be available to the "Demolition" class.
Looks like a good gameplay mechanic!