Copyright Confusion

So, I'm trying to figure out if Rudyard Kipling's poetry is still under copyright, and I'm getting more and more confused the deeper I dig. Since I live in the United States, I presume that any of his poems that were published in the United States before 1923 are not under copyright in the US. However, current British copyright says 70 years from the author's death, and Kipling died in 1936. Does anyone know the answer to this? Would I be breaking copyright laws by posting Kipling poetry... or not?