Both because you need both farm and and transportation
The US purchased the Florida Territory from Spain... i think that was in 1819
rule of law is simply the guarantee that those in power shall be guided by the spirit of the constituion while making decisions and in their actions. It is the first foundation of the USA constitution calling on all entities, and indiduals in The USA to be accountable to the laws of the land. in the american government, leaders are expected to follow the spirit of the law while making decisons. For example the president ensures that he respect the separation of power doctrine.
One major trade Egypt consisted of was Wheat.