What final lines of the declaration of independence illustrate the magnitude and unity of the signers?

The concluding sentence of the Declaration of Independence is an undertaking among the signers, to “mutually pledge to each other our Lives, our Fortunes, and our Sacred Honor,” and several of them and their fellow loyalists did in fact sacrifice their lives and affluences in service to the country.

gaius cassius longinus and marcus junius brutus, former enemies of julius caesar who'd joined the roman senate, led caesar's assassination, dubbing themselves "the liberators." and the second one is   the assassination of julius caesar was the result of a conspiracy by many roman senators led by gaius cassius longinus, decimus junius brutus albinus, and marcus junius brutus. they stabbed caesar (23 times) to death in a location adjacent to the theatre of pompey on the ides of march 15 march 44 bc.