Byzantium/Constantinople was conquered in 1451, but the empire continued to decline starting around the 18th or 19th centuries. It officially died in WWI. As for how long it was a major threat to Europe, the empire's prime was the 16th century, under Suleiman the Magnificent.
The Continental Army was established by a resolution of the Continental Congress. The Continental Army under the command of George Washington was created to coordinate the military efforts of the 13 colonies in the rebellion against British rule.The soldiers had no formal military experience, no uniforms, no established commanders and there were limited firearms. The Continental Army were obvious underdogs. However, The Continental Army did have some advantages over the British Army: their soldiers knew the terrain and could make use of this knowledge using defensive tactics. Also they had great leaders.
Answer:
The President of the United States is the head of the executive branch.
Explanation:
The President gets help from the Vice President, department heads (called Cabinet members), and heads of independent agencies.
Edward Snowden was a guy who was a computer professional. He showed disobedience because he was <span>Known for_Revealing details of classified United States government surveillance programs. He went to Hong Kong to tell people every information about US. I'm sorry, but I know nothing about his accomplishments. Hope this helped!</span>