Since Twitter discontinued Moments, I'll save all the threads on this site, including those from the USMC Museum, the British Army's Land Warfare Center, and Guest Threads in all the series.
Building an American Army (1939-1941)
Why We Fight ~ 1942 (MoT threads)
Why We Fight ~ 1942 (Land Warfare Centre threads)
Why We Fight ~ 1942 (USMC Museum threads)
Why We Fight ~ 1943 (MoT threads)
Why We Fight ~ 1943 (USMC Museum threads)