Fans can expect a 3-hour-plus show including full-length sets from each band, with the two groups combining for show-opening and -closing jams.

The outing kicks off June 24 in – where else? – Chicago and stops in another 40 cities before winding down at Verizon Wireless Amphitheatre in Irvine, Calif.

EW&F bring a catalog of some of the most influential funk and R&B of the era, including such hits as “Shining Star,” “That’s The Way Of The World,” “Reasons,” “Boogie Wonderland” and more.

The band spawned solo acts in Philip Bailey and Maurice White, and was inducted into the Rock and Roll Hall of Fame in 2000

Chicago, which made rock safe for horn sections, has an impressive catalog of its own including “Color My World,” “25 or 6 to 4,” and “Only the Beginning,” making rock safe for horn sections.