Hee, hee! That's another great movie.
Yes, the
Indiana Jones and the Last Crusade prologue with River Phoenix takes place in 1912, when Indy's thirteen. Sean Patrick Flanery's episodes as a young Indy all take place from 1916 to 1920. In the show, in February 1916 he and his dad are back in Princeton, where Indy's finishing up high school; they go visit family out west the next month, and Indy's cousin Frank takes him down to the border for some shenanigans, and Indy winds up first kidnapped by and then joining Pancho Villa's forces, a few months before he (Indy) turns 17. It's there that he meets Remy Baudoin for the first time, and the two of them realize Villa's fight is not their own, while the war in Europe very much is (at least for Remy, and Indy decides that fight is simply too important to lose, and winds up joining Remy when Remy decides to leave Villa's army and join the Belgian army back home).