His accomplishments is technology
A massive topic for this could be oil. You could talk about OPEC and the different types of technologies involved
One of the main reasons why Andrew Johnson faced difficulty implementing his Reconstruction plans is because he face harsh opposition in Congress--both by Radical Republicans and Democrats alike.
You should search this up online and try downloading the one that is best
Under the Land Ordinance of 1785, "4.the development of colonies" was promoted since this ordinance raised raised revenue for the government through the sale of new territory.