Answer:
During his first year-and-a-half in office, he rejected American intervention after the CIA-guided Cuban exile invasion at the Bay of Pigs failed, effectively ceded the landlocked Southeast Asian nation of Laos to Communist control, and acquiesced in the building of the Berlin Wall. Kennedy's decisions reinforced impressions of weakness that Soviet Premier Nikita Khrushchev had formed in their only personal meeting, a summit meeting at Vienna in June 1961.
Tenochtitlan's water supply was provided by two terracotta aqueducts from the springs of Chapultepec.
The very first military setback for Adolph Hitler and his forces was the Battle of Britain. This occurred during WWII when Hitler was forced to cancel his planned invasion of Britain. This operation was known as Operation Sea Lion. He continued to bomb them but was unsuccessful in defeating them.
Concordat of 1801, agreement reached on July 15, 1801, between Napoleon Bonaparte and papal and clerical representatives in both Rome and Paris, defining the status of the Roman Catholic Church in France and ending the breach caused by the church reforms and confiscations enacted during the French Revolution.