After the allegations that both Assistant Treasury Secretary Harry Dexter White and FDR advisor Alger Hiss were Soviet agents, loyalty tests were required for government and other employment and lists of subversive organizations were maintained.
Exiled to the island of Elba, he escaped to France in early 1815 and raised a new Grand Army that enjoyed temporary success before its crushing defeat at Waterloo against an allied force under Wellington on June 18, 1815. Napoleon was subsequently exiled to the island of Saint Helena off the coast of Africa. Six years later, he died, most likely of stomach cancer, and in 1840 his body was returned to Paris, where it was interred in the Hotel des Invalides.
Immediately, people and troops began to rally to the returned Emperor. French police forces were sent to arrest him, but upon arriving in his presence, they kneeled before him. Triumphantly, Napoleon returned to Paris on March 20, 1815. Paris welcomed him with celebration, and Louis XVIII, the new king, fled to Belgium. With Louis only just gone, Napoleon moved back into the Tuileries. The period known as the Hundred Days had begun.