when did its operation first begin?
May 25, 1787
Constitutional Convention (United States)
It was not until May 25 that a quorum of seven states was secured and the convention could begin inside the Pennsylvania State House. New Hampshire delegates would not join the convention until July 23, more than halfway through the proceedings.
which event convinced leaders to have a constitutional convention to create a new government rather than fix the existing one. what is the historical account behind this? After declaring independence from Britain in 1776, the thirteen states created a permanent alliance to coordinate American efforts to win the Revolutionary War. This alliance, the United States, was to be governed according to the Articles of Confederation, which was more of a treaty between independent countries than a national constitution. The Articles were adopted by the Second Continental Congress in 1777 but not finally ratified by all states until 1781.
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Constitutional Convention (United States) [SEP] Operations and procedures
Originally planned to begin on May 14, the convention had to be postponed when very few of the selected delegates were present on that day due to the difficulty of travel in the late 18th century. On May 14, only delegates from Virginia and Pennsylvania were present. It was not until May 25 that a quorum of seven states was secured and the convention could begin inside the Pennsylvania State House. New Hampshire delegates would not join the convention until July 23, more than halfway through the proceedings. The first thing the Convention did was choose a presiding officer, unanimously electing George Washington president of the convention.