How long did it take the AEF to get prepared for combat?2 years10 years5 years1 year

How many troops did the AEF lose in less than one year of battle?320,00012,000100,0005,000

A ______ commander, in view of the ‘extended battlefield’ must consider actions beyond immediate frontlines, up to 15 kms into the enemy’s rear.Select one:a. Brigade.b. Company.c. Battalion.d. Battery.

he passage below is accompanied by a set of questions. Choose the best answer to each question.Over the aeons, the capacity to gauge duration has correlated directly with increasing control over the environment that we inhabit. Keeping time is a practice that may go back more than 20,000 years, when hunters of the ice age notched holes in sticks or bones, possibly to track the days between phases of the moon. And a mere 5,000 years ago or so the Babylonians and Egyptians devised calendars for planting and other time-sensitive activities.Early chronotechnologists were not precision freaks. They tracked natural cycles: the solar day, the lunar month and the solar year. The sundial could do little more than cast a shadow, when clouds or night did not render it a useless decoration. Beginning in the 13th century, though, the mechanical clock initiated a revolution equivalent to the one engendered by the later invention by Gutenberg of the printing press. Time no longer ‘flowed’, as it did literally in a water clock. Rather it was marked off by a mechanism that could track the beats of an oscillator. When refined, this device let time’s passage be counted to fractions of a second.The mechanical clock ultimately enabled the miniaturization of the timepiece. Once it was driven by a coiled spring and not a falling weight, it could be carried or worn like jewellery. The technology changed our perception of the way society was organized. It was an instrument that let one person co-ordinate activities with another. ‘Punctuality comes from within, not from without,’ writes Harvard University historian David S. Landes in his book Revolution in Time: Clocks and the Making of the Modern World. ‘It is the mechanical clock that made possible, for better or worse, a civilization attentive to the passage of time, hence to productivity and performance.’Mechanical clocks persisted as the most accurate timekeepers for centuries. But the past 50 years has seen as much progress in the quest for precision as in the previous 700. It hasn’t been just the Internet that has brought about the conquest of time over space. Time is more accurately measured than any other physical entity. As such, elapsed time is marshalled to size up spatial dimensions. Today, standard makers gauge the length of the venerable metre by the distance light in a vacuum travels in 1/299,792,458 of a

In 2020, scientists are working across the globe to quickly create a safe and effective vaccine to protect individuals against COVID-19. The creation of a safe vaccine is a long process with many steps. The fastest vaccine ever created took about 4 years to make.Flu shot by Military Health System (CC0)As scientists are working to make a vaccine against COVID-19, which of the following do they need to take into consideration?Elimination ToolSelect one answerAThe number of people infected with COVID-19.BThe number of people infected with other viruses.CThe safety of the vaccine when injected into a human patient.DThe amount that each vaccine will cost.

Approximately how many Allied soldiers landed on the beachheads on D-Day? a104,000 b540,000 c132,000 d68,000