What legions did Marcus Brutus command during the battle of Philippi?

In the initial battle that occurred at Philippi (in October of 42 BC/BCE) between opposed Roman armies, Marcus Brutus commanded approximately half (about eight legions) of the entire force available to the so-called 'Liberator' army, the other half of which was led by Cassius. Achieving success against the enemy on his front while Cassius' force was routed (with Cassius himself committing suicide in response), he then commanded the entirety of the force that remained -- only to be routed by Octavian and Antony in the second Battle of Philippi a few weeks later.