How much time has passed between the development of the first stone tools and the development of agriculture?

2.4 Million years.

Explanation: The first stone tools were found in Africa and are 2.5-2.4 million years old.  The agricultural revolution started around 12,000 years ago. Hope this helps!

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).

we need the chart or check box