During 1920 and 1921 it was Poincare's influence that was mainly dictating the aggressiveness of French feeling in international politics; and during the latter part of Briand's premiership, culminating in Briand's visit to the United States for the Washington Conference at the end of 1921, it was Poincare who was fomenting the criticism that French interests were being undermined.
His principal difficulties were due to the aggressiveness of Muscovy and the disloyalty of Prussia.
When the Mermnad kings raised the Lydian power and aggressiveness Smyrna was one of the first points of attack.
The other great difficulty, apart from the succession, with which Elizabeth had to deal arose from the exuberant aggressiveness of England, which she could not, and perhaps did not want to, repress.
Jackson was very successful in collecting old claims against various European nations for spoliations inflicted under Napoleon's continental system, especially the French spoliation claims, with reference to which he acted with aggressiveness and firmness.
On his arrival in Sweden, however, he tried to gain time by provisionally confirming what had been done; but the aggressiveness of the Protestant faction and the persistent usurpations of Duke Charles (the Riksdag of 1595 proclaimed him regent though the king had previously refused him that office) made a civil war inevitable.