Chivalry. It's not really behavior so much as "I'm more powerful than you and I want your daughter, give me your daughter or I'll kill you", but your history teacher will want the answer chivalry, so I suggest you answer that, lol.
It meant that there were nukes very close and within striking range of the USA.
That they would declare war on japan.
Answer:
Imperial expansion in Europe and Asia resulted from the increased use of gunpowder, cannons, and armed trade to establish large empires. Most of the groups that were conquered were weak or disorganized. These land based empires included the Manchu in Central East Asia, the Mughal in South and Central Asia, the Ottoman in Southern Europe, the Middle East and North Africa. The rulers centralized their power over politics, religion and the military. They also controlled trade, enriching the rulers, who created cultural monuments and stronger militaries.