Grand Masters hold responsibility for maintaining the Chapter's many alliances, whether with other Adepta within the Imperium, or the various alien races with whom the Grey Knights have covert dealings. The actual detail of such treaties, pacts and accords are worked out by the Chapter's scribes -- a warrior's time is too precious to be expended on such bureaucratic detail. The Grand Master's chief role in these matters is to attend all meetings with outsiders in his full regalia of war. He speaks as little as is necessary, his grim and martial aspect a stark warning to any who would think to abuse his Chapter's trust. The threat in his manner is clear: betray us, and a thousand warriors such as I shall seek revenge.