Before we can say what followed, we must first address the situation in India. Alexander had left an officer, Mithriades, who supported his hardline policies against the Indians. He would not last long, and a group of Nubians, disgusted at being shut out of pretty much anything but menial tasks, would ambush him as he was on his way to a meeting with other officers, and stab him five times before he collapsed in a pool of blood.
The Nubians knew they would not last too long in a strange land without some sort of strong leader, as the situation would likely collapse. The didn't really have any high-rankign officers either. So they would support the candidacy of Antigonus, probably the most senior general and probably the most respected in the army as interim govenor.
Antigonus would then take steps to keep the situation from spiraling any more out of control. After sigining a treaty with the Mauryan Empire, recognizing his annexation of western India, he would remove the restrictions on the local religious practices remove troops from the main palace of the rajahs of Chera and Chola to ease their paranoia and possibly incurring the wrath of other high-ranking offcials, and gave them much gave compensation, if small, to soldiers and officers who felt they had been mistreated, in the form of larger salaries. After promising better treatment for Pandya, they again came back into the fold. Anhara, once again, confident in their power, even though they received a sizable defeat five years earlier, thought that the various states would not necessarily act in cooporation with the foreigners. So Antigonus fortified the border.
After his death on Decemeber 23 294 BC, unfortunately, the situation would start to degenerate. His successor, Sataxarxes, a Mede, knew the importance of working with local rulers, but lacked tact, and would make the mistake of insulting the rajah of Pandya, a cousin of the previous one that was overthrown in the last invasion. This man would then mobilize nationalist forces in late 292, and fought a five-month conflict that would end up with the defeat of the Alexandrians, because Satarxarxes decieded they had taken too many casualties. He would, from that point on, use tact while meeting with high-ranking Indians.
Alexander would then settle down to the governing of his kingdom. But then, a revolt would start in Greece in January 295 BC, because Alexander had lowered taxes by only ten percent of their pre-war levels, and commerce was greatly hurting. So Alexander quickly occupied Thessaly, and would sail navies down to Athens and Corinth, both of whom were active in the revolt. His naval superioity was quickly established with the capture of Piraes Athens would fall after a five-month siege, all while attempts at smuggling food from unoccupied areas succceded in bringing food, sometimes literally right next some of the soldiers. It would eventually be discovered by a sentry who noticed the odd behavior of one of the ordianry citizens and Athens would last only another month before falling. At this time, Corinth was also being sieged, but would fall quicker due to being surrounded on four sides within seven weeks. The troops from that would then go to Sparta. Sparta, having a strong warrior tradition, fought like they were possessed, and tried to keep the forces of Demetrius, the general in charge of occupying the Pellaponnese distracted by attacking other places like Argos, remaining loyal to Macedon because of their traditional hatred for Sparta. But Demetrius would not be distracted, reaching Sparta by April 14, and occupied Messina on April 22, depriving the Spartans of a major source of their food.
It was, admittedly taking a big risk, but Demetrius had enough troops (about 45,000) to where he could spare some for Argos and other cities. The Spartans were strong, and defeated the reinforcements in a couple of places, but, upon the arrival of Alexander with around 30,000 on June 2, pulled troops from all other fronts to meet him. Alexander would reoocupy Messina, which had been retaken in a countterattack on May 12. He would then demand a surrender from the oligarchs of Sparta around this time, who promptly refused. But they were having a hard time holding out, and the reinforcements were trying to fight off by attacks by cities loyal to Alexander. So Alexander, not thinking of the reinforcements, and only thought the Spartans could hold out another five days, would offer surrender again on June 15, and once again would be rebuffed.
Then the reinforcements would arrive two days later. Being as they arrived from about three different araes, they would select Leonidas, named for the heroic king who died at Thermopylae, as their leader. Leonidas would try to find Alexander's weak spots and exploit them, even though he about half as many troops(about 35,000) as Alexander. Alexander, desperate to find a way to deal with the fierce Spartans, decided on a number of bold and tricky maneuevers which were somewhat out of character for him. It worked. Leonidas was routed, and his forces scattered. It would take about ten days to find and surround these forces. And even then, there were still stories of bandits who wandered the mountains, and attacked anybody that looked like a barbarian, and did so with remarkable efficiency.
Sparta would be occupied on June 21. Alexander was not a man like his father to destroy any city who would piss him off. But, at the same time, he knew a message had to be sent to the other Greeks cities not to think about ever revolting again. So he razed several buildings, had the two kings executed each in Athens and Corinth, and sold anybody who had fought agaisnt him into slavery. Needless to say, the fall and near-total detruction of the most fierce city in Greece would shock the Greek citizens into submission, and there were to be no more revolts during the duration of Alexander's reign. There were also revolts in Latium and Persia, but they were put down in roughly three and a half months,and didn't have any of the same heroic efforts of resistance
Philip would then pull his brother aside when he retuned to Tyre on July 7, and tell him that he though there should have been better treatment for some of the Latin revolters, who had been forced to watch a statue of their first king Romulus defaced. Alexander would brush him off and say he did not know the proper way to rule a kingdom. And at the same time, he thought Philip was interested in more power for himself. So he payed one of the sevants at Philip's house in Pella to keep watch on him. He would get reports of occasional meetings between Philip, some scruffy-looking barbarians, and a couple of people that might have been Arab or Egyptian, from their skin and facial features. Philip apparently was telling them how dissatisfied he was with his brother. Alexandee was not excessively paranoid, and so did nothing else, but it would raise his suspicions.
Alexander, however was starting to get reports from loyal satraps that collecting taxes was placing too much strain on them. Alexander throughly trusted these men, and so lowered taxes, since their was no huge reason to keep them so high anyway.
But, in the spring of 293 BC, Alexander would be bit by the conquering bug, and would decided to conquer a kingdom in northern Asia Minor known as Cappadocia . It's ruler, Ariarathes had been left alone by the older Alexander, since the had given him no trouble, and had acknowledged his sovreignty nominally. Alexander the younger was not happy about having a foreign ruler so close to his control, however. So Alexander would lead an army to Cilicia and then invade Cappadocia from there. The kingdom would fall under his control in about three and a half weeks. Ariarathes would walk out of the gate of the main capital to offer his kingdom to Alexander after it became clear the Capapdocians did not have the forces to resist for any longer.
So then after this. Alexander would impose a more authoritarian rule than his father. Taxes would remain at a constant high level to officially raise money for such things as better roads in Gaul, which had several cities built, but otherwise, not had much of it developed. And Alexander would also impose a tax on the Jews of Judea to practice their religion. This would lead to a revolt in Sepember-November 292 BC, which would prove surprisingly hard to put down. Despite that many of their leaders were on Alexander' side, they put up tenacious resistance agaisnt the armies that converged on them from three sides. After holding these armies off, from the area around Jerusalem, Jericho, Alexander would come himself and enflict a decisive defeat on the rebels. On advice of the leaders Alexander agreed to lower the tax on religion by half, but refused to abolish it altogether.
Meanwhile, Philip was using this as an excuse to pressure Alexander more to relieve the tax burden. Philip, guessing correctly that it was causing problems would travel around the empire and hear complaints from merchants and farmers that the taxes were preventing them from having many essential comforts, and that they were barely keeping their famlies fed. In Nubia, there even seemed to be talk of revolt, having many bitter feelings about what happened thirty years earlier.
Alexander, by this time was getting more and more suspicious. Then he would get what confirmed in his mind that his brother was plotting to overthrow. The servant he paid to spy on Philip's nightime meetings revealed that Philip had a number of officers including Chosroes, who had been set to succeed as satrap of Parthia, simce the current one, Mithriades was expected to die in the next few years, and Menelaus, an officer who had served in India. Apparently, Philip was trying to convince these men that Alexander was a bad king, and to try to not carry out his policies effectively.
Alexander, when he heard this news was not happy. Philip was essentially fostering division of his empire, and advoacating decentlization of a ridiculous order!

It sounded like Philip hadn't convinced eevrybody but Alexander was starting to get ever more paranoid So he would order a small company of assassins to murder Philip, sometime in the evening, when it was known he always had dinner. Unfortuantely, for alexander, a friend of Philip's happened to be walking by, and leaned in the open door to overhear him. The events that followed would prove tragic......