Around 10 June 43 BCE: To the Magistrates and People of Rome from Decimus Brutus and Lucius Munatius Plancus (?)
Decimus Brutus and Plancus combine forces against Antony and Lepidus
[...]1 they2 had come to hope, thinking that Plancus’ four legions were not equal to their entire force, and not believing that an army could be brought over from Italy so quickly. So far, the Allobroges themselves and our entire cavalry, which we sent there in advance, have been holding them back arrogantly enough, and we trust that we can hold them back more easily when we arrive. Still, if they happen to have crossed the Isara, we shall work hard to ensure that they do no damage to the Republic.
Please be in good spirits and have the highest hopes for the affairs of the Republic, seeing as both ourselves and our armies are joined in a remarkable harmony and prepared for anything on your behalf.
But still, you ought not to take any less care or work any less hard to ensure that in military and other matters we are as prepared as we can be to fight for your safety against a most criminal combination of our enemies. They have spent a long time gathering troops under the pretence of it being for the Republic, but have suddenly turned into a danger to their country.
Latin text of ad Familiares 11.13a | Glossary | Historia Civilis video overview of 44-43 BCE
Footnote borrowed from Shackleton Bailey: ‘The latter part of an official letter from Plancus and D. Brutus to the Senate, attached in the MSS to 388 (XI.13). It was probably written soon after their junction, which had been expected to take place on 9 June (414 (X.23).3).’
Probably Antony and Lepidus.