This is definitely a person becoming a naturalized U.S. citizen who is taking the Oath of Allegiance.
I believe the correct answer would be strong/strength, because fort means strength.
<span>The answer should be Some African states participated in slave trade to gain more wealth and power. </span>
In the year 1803, the United States of America purchased the approximately 828 million square miles of territory from France, doubling its territory. Because of Thomas Jefferson's purchase of the Louisiana territory, 15 states were added in the territory of America. It stretched from the Canadian border in the north to the Gulf of Mexico in the south and from the Rocky Mountains in the west to the Mississippi River in the East.
