Athenian and Spartan Town Phase champions were a casualty of the Stoa being removed. It was a unique strategy and this patch returns it to the Athenians. It also means that the Athenian Marines will be seen on non-naval maps and give the Athenians a consistent 3rd champion option to make up for lacking cavalry champions.
This patch makes them accessible in the Barrack (mercenary achers too) and to do this the Iphicratean Reforms technology was moved from the City Phase to the Town Phase and moved from the Pyrtaneion to the Civic Center.