Fortinbras had it coming because his name was gay
Prince Hamlet's father (who was also called Hamlet) killed the father of Fortinbras (who was also called Fortinbras)
Fortinbras uncle is the brother of Old Fortinbras (the father to the Fortinbras in the play), who was killed by Old Hamlet before the play begins. He, Fortinbras uncle, is the current ruler of Norway, and as such is often refered to as "Norway." In Shakespeare's text, all of the action involving this uncle happens off-stage, hence he is not a listed character.
King Hamlet won, and therefore won certain territories in Norway, which young Fortinbras resents.
Although, Fortinbras and Hamlet both lose their fathers under very similar circumstances, their reactions are very different. While Hamlet spends most of his time plotting revenge over the outrage of the murder of his father, Fortinbras goes proactive, raises an army and avenges his fatherâ??s death immediately.
Young Fortinbras had gathered a troop of lawless desperadoes to try and take back the land that his father lost.. can be found in Act 1 Scene 1 lines 99-111
Fortinbras son of Fortinbras has sharked up some soldiers in the skirts of Norway to invade Denmark with a view to taking back certain lands which Hamlet father of Hamlet had taken from him. Claudius the King of Denmark is on to him, however, and gets Fortinbras's uncle the king of Norway to stop the invasion. In the meantime, Denmark is ready for the invading army should it arrive.
Claudius sends ambassadors to "Old Norway"to try to get him to calm young Fotinbras down. Fortinbras has sent Denmark a list of ultimatums, thinking they are weak from the death of Hamlet sr., or else he will wage war.
Hamlet nominates young Fortinbras to take the throne of Denmark.
Claudius writes to his uncle the king of Norway telling him what's going on. The king of Norway takes care of Fortinbras.
I suspect Claudius does not take young Fortinbras as a serious threat to Denmark. At Act 2 Scene 2, news of Norway from Voltemand would appear to be "good news", yet this diplomatic importance to the King plays second fiddle to Hamlet's health. Claudius does not promptly respond to this message and would wait/hesitate (much like hamlet) without taking prompt action: "Wasting time", as a nervous Polonius would interject The message when looked at closer from Voltemand's speech, suggests that Old Norway had arrested his nephew, briefly, yet given him 3000 crowns to employ his army previously levied. This is basically taking money out of the left pocket and putting it in the right pocket. I suppose a better question would be, "Should Claudius fear young Fortinbras?" Claudius publicly states to the court that young Fortinbras holds an arrogant view of Denmark, crippled by a pyrrhic victory. Instead of answering this young man directly, Claudius turns his attention to Old Norway and sends "dilated articles" (detailed instructions) on how to handle young Norway. I do wonder if those 3000 crowns was of Claudius' money. The fortified garrison watch would suggest so, yet no offensive manoeuvrings are planned from Denmark. Diplomacy seems to be the best course of action for the treacherous King. Does Fortinbras intend to conquer Denmark? Or reclaim the land lost by his father in battle in Poland? Does he come to Elsinore directly from Norway's lands, or on his way back from Poland? Where are the soldiers levied?
Fortinbras is not allowed to conquer the lands his father lost, but instead he's allowed to conquer a meaningless scrap of Polish land. This involves marching through the lands his father lost. So it might all be a trick.
"Revenge his foul and most unnatural murder." Simple as that. He wants young Hamlet to kill the man who murdered him. Hamlet summarizes the request as "Remember me!" but it's clear that what is meant is a call to vengeance.
Hamlet was at school at Wittenberg, a famous college in Germany. Wittenberg is where the Protestant Reformation started, and that's probably the association we're supposed to make. He returned to Elsinore for the funeral.