Map showing areas affected by land distributions, per findings of Gracchan boundary stones (cippi) in consequence of the 133 BC lex Sempronia passed by Tiberius Sempronius Gracchus.
Areas in red are well-documented; areas in gold are highly likely.

Background map tiles by Stamen Design. CC-BY 3.0. Based on map data provided by OpenStreeetMap. Location of Gracchan distributions georefrenced from Saskia Roselaar, Public Land in the Roman Republic (OUP, 2010) p. 253. Data plotted on WGS 84 / Pseudo-Mercator (EPSG:3857).
Own work
Ifly6