Why were black soldiers not used in battle as much as they wanted?

What did the u.s. want to build on the land acquired through the gadsden purchase?

Which of the following were lyndon johnson's goals as president?

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.