sentences:  Early Mongol diplomacy had been not a simple offer of cooperation, but straightforward demands for submission.It was only in later communications that Mongol diplomats started to adopt a more conciliatory tone; but they still used language that implied more command than entreaty.Even the Armenian historian Hayton of Corycus, the most enthusiastic advocate of Western-Mongol collaboration, freely admitted that the Mongol leadership was not inclined to listen to European advice.