After some fighting against Perdiccas , the combined Athenian forces sailed to Potidaea and landed there .
In response , Athens sent out another 2,000 hoplites and 40 more ships , under the command of Callias .
After some fighting against Perdiccas , the combined Athens forces sailed to Potidaea and landed there .
In response , Athens sent out another 2,000 hoplites and 40 more ships , under the command of Callias .