That it was too large for the Union to conquer.
It would be King Leopold II of Belgium that saw the nation of Congo as an opportunity for Belgium to acquire its first colony and compete with other European powers in imperialism and colonization race in the world. He was known for his harsh and cruel treatment to the native inhabitants in Congo.
The USA didn't want communism to spread.
Europeans were originally motivated to explore the seas to discover previously unknown lands, especially after the contact with America, where europeans found all kind of valuable goods. The portuguese were the first to pursue maritime exploration, soon to be followed by the spaniards.
This item symbolizes enforcement and respect, and means that justice stands by its decision and ruling, and is able to take action. The fact that the sword is unsheathed and very visible is a sign that justice is transparent and is not an implement of fear.
