Brutus wanted to match to battle in Phillipi. He didn't trust the people in between where they where and Phillipi to be loyal to be loyal. He wanted to take the battle to Phillipi.
Explanation:
Cassius suggested that their armies stayed in one place and wait for the enemy to come to them because he believed the enemy would be worn out and tired before they got to them.
But Brutus wanted to do otherwise, he wanted to lead his armies to Phillipe where they can gather fresh forces and gather new recruits who had dislike for Antony and Octavius. Brutus felt it was better if their troops met Anthony and Octavius at Phillipi since the people in the middle of where they currently were and Phillipi may not be trusted to be loyal. He felt a show of force would be better. Therefore he decided to take the battle there
Brutus won the argument and they were defeated in Phillipi.
