In 'The Tragedy of Julius Caesar,' Cassius is the most concerned about Caesar taking power, and accepting the role of king. He believed this was a betrayal of the Roman people's trust, and actually a blasphemy if compared to the glory of the Republic.
he is less friendly
Cassius is concerned about the eagles being replaced by kites and ravens.
brutus does not seem upset by it
The cause of conflict is that Cassius thinks that Brutus has wronged him by rebuking Lucius Pella, the fellow for whom Cassius had recommended through his letter and Brutus is miffed with Cassius because he was conveyed that Cassius had denied giving him money to pay his legions. They both seem to misconstrue the facts and end up lashing at each other.
To have caesar removed from power
After sarcastically comparing Caesar to the Colossus of Rhodes, showing how Caesar thinks himself superior to the senators, his epilepsy makes him seem less than an average senator, in Cassius' mind.
Titinius killed Cassius with Cassius' sword.
Brutus means that at one time they were close but now there seem to be differences getting between them.
it is cassius' birthday.
Cassius Dio's birth name is Cassius Dio Cocceianus.
Brutus killed himself after the final battle because it was the honorable thing for a defeated Roman commander to do. People seem to forget that Brutus and Cassius were leaders of armies, they were generals at the time of their defeat.
Cassius does not respond to the death of Brutus as Cassius dies before Brutus does. Brutus responds to Cassius' death with tender words.