Answer
Perdiccas, the regent of Alexander the Great's empire, faced opposition from several generals, including Ptolemy I, the future ruler of Egypt. Ptolemy joined a coalition against Perdiccas, aiming to challenge his authority and secure their own power. This coalition paved the way for the eventual division of Alexander's empire into several Hellenistic kingdoms, with Ptolemy establishing himself as the founder of the Ptolemaic dynasty in Egypt.