Nevertheless time, so scarce with the Romans, was running short. Justinian was impatient to have done with the Italian war, for the general situation was extremely grave; upon the Danube an invasion of Slavs was gathering; in Asia, Persia threatened the empire. It is not altogether surprising then that Justinian now made an attempt to come to terms with Vitiges behind the back of Belisarius. He sent two ambassadors to offer peace upon the following really amazing terms, namely, that the Goths were to have half the royal treasure and the dominion of the country beyond the Po, that is to say, to the north of the Po; the other half of the revenues and the rest of Italy with Sicily were to be the emperor's. The ambassadors showed their instructions to Belisarius, who had them conducted into Ravenna, where Vitiges and the Goths gladly consented to make peace and to accept these conditions. But both sides had reckoned without Belisarius, who doubtless saw that such a peace could not endure and that all his labour, if such terms were to be made, had gone for nothing. Nothing would satisfy his ideas of security save the absolute defeat of the Goths with its natural sequel, the bringing of Vitiges to Constantinople as a prisoner. He, therefore, refused to sign the treaty, leaving it to be established by the ambassadors alone. But when the Goths saw this they thought that the Romans cozened them, and refused to conclude anything without the signature and oath of Belisarius. That Belisarius was right we cannot doubt; but his action naturally laid him open to be accused of a design, against the emperor's intentions, to prolong the war for his own glory. Nor were certain of his generals slow to make such an accusation. When he heard of it, he (who had suffered more than enough from the disloyalty of subordinates) called them all together, and in the presence of the ambassadors confessed that Fortune was the great decider of war, and that a good opportunity for peace should ever be seized. Then he bade them speak their minds in the present case. They declared then, one and all, that it were best to follow the instructions of the emperor. When Belisarius heard them speak thus he was glad and bade them put their opinions in writing, that neither he nor they might afterwards deny their confession that they were not able to subdue the enemy by war.