These are maps of modern distribution of haplogroup R1a-M198 and its main subclades, using natural neighbour interpolation.
The expansion of R1a-M417 was most likely associated originally with the spread of the Corded Ware culture.
Proto-Indo-Iranians expanded under R1a-Z93 bottlenecks from Sintashta-Potapovka into the Srubna-Andronovo horizon, while Eastern Uralic peoples probably expanded eastwards with the Andronovo-like horizon.
Most extant hg. R1a-Z284 subclades were probably associated with the expansion of Proto-Germanic in Scandinavia and later with the expansion of Vikings:
While hg. R1a-Z280 was originally associated with Finno-Ugric peoples, the majority of R1a-Z280 lineages are currently found in modern Balto-Slavic speakers.
Haplogroup R1a-M458 appears to have been associated with northern Europe around the Baltic Sea, and quite likely with the early Slavic expansion: