The title of the presiding officer of the house of representatives is

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

a. competition between france and england for land and power

c. troops marched forward in close formation against newer, more accurate weapons