What was the effect of the louisiana purchase? it doubled the size of the country and provided control of the mississippi river. it improved relations with england and canada and prevented indian invasions. it stimulated the economy and strengthened the alliance with france. it prevented a western attack on the united states by spain.

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.