The new Spike Lee. I went in cold. Four of five "bloods" (an all-black squad) from the Việt Nam/American War return in something like 2018, using the recovery of their mate's body (KIA not POW) as camouflage for the ex-filtration of a gold cache they left there back in the day. It's filmed in Thailand. The tone is lecturing and there's a pretence of historicity with a lot of gesturing at Black history and a little Vietnamese. Lee wants to have it all ways with loads of references to the classic movies of the genre, NGOs, didacticism, cliches, and so forth, ultimately sliding into an unfunny Tropic Thunder mode. (The surviving cast doesn't even feign grief when one of da bloods gets it in the present day.) Lead Delroy Lindo is intended to be weighty, like Jim Caviezel in The Thin Red Line but comes off more like a prolix Rambo. Chadwick Boseman makes up for some of these defects. The introductory newsreel is unfortunately more generically 1960s than Lee's scintillating effort in BlacKkKlansman. (Paul Walter Hauser and Jasper Pääkkönen return from that, again to limited effect.)
In all, it's a few decades stale.
Widely reviewed. Michael Wood. A. O. Scott found a lot more here than I did. Viet Thanh Nguyen's rejoinder; he's right, this is lesser Lee: a pile of gesturing with an ending messier than Apocalypse Now's.