Question: The Panzer Grenadier series was a game that was based on the conflict that last during what time period?

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Avalanche Press: Avalanche Press is an American company that publishes board wargames and has published some role-playing game supplements.  They have produced "The Great War at Sea" and ""Panzer Grenadier" series", as well as "Red Parachutes", one of their earliest games and a detailed study of the Soviet crossing of the Dnepr River in 1943.

Notice period: The notice period is the time period between the receipt of the letter of dismissal and the end of the last working day.  This time period has to be given to an employee by his/her employer before his/her employment ends.  It also refers to the period between resignation date and last working day in the company when an employee resigns.

Economic data: Economic data or economic statistics are data (quantitative measures) describing an actual economy, past or present.  These are typically found in time-series form, that is, covering more than one time period (say the monthly unemployment rate for the last five years) or in cross-sectional data in one time period (say for consumption and income levels for sample households).  Data may also be collected from surveys of for example individuals and firms or aggregated to sectors and industries of a single economy or for the international economy.  A collection of such data in table form comprises a data set.

The Last Night of the Yankee Dynasty: Last Night of the Yankee Dynasty is a book written by ESPN sportswriter Buster Olney that chronicles the rise and fall of the New York Yankees' 1996-2001 dynasty against the backdrop of the franchise's loss to the Arizona Diamondbacks in Game 7 of the 2001 World Series.  It also has multi-page accounts of several key members of the Yankees organization during this time period and during the time period of the Yankees' dynasty.

Temporal mean: The temporal mean is the arithmetic mean of a series of values over a time period.  Assuming equidistant measuring or sampling times, it can be computed as the sum of the values over a period divided by the number of values.  A simple moving average can be considered to be a sequence of temporal means over periods of equal duration.  (If the time variable is continuous, the average value during the time period is the integral over the period divided by the length of the duration of the period.)

Infantry Attacks series: Avalanche Press' Infantry Attacks series is a World War I version of Avalanche Press' "Panzer Grenadier" tactical combat series.  "Infantry Attacks" is very similar to "Panzer Grenadier" -- the two series' use the same map formats and have very similar rules.

World War II: World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier.  It involved the vast majority of the world's countries—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis.  It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries.  In a state of total war, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources.

Calculating forecast attainment: Calculating forecast attainment periodically (monthly for example) provides visibility to the overall achievement of the plan and the total business bias.  The time period of shipping activity should be compared against the forecast that was set for the time period a specific amount of days/months prior which is call Lag.  Lag is based on the leadtime from order placement to order delivery.  For example, if the leadtime of an order is 3 months, then the forecast snapshot should be Lag 3 months (Lag 3).

Population change: Human population change is the difference between the size of the population from the beginning to the end of a certain time period.  In other words, population change refers to change in the number of people during a specific time period.  As a whole,the world population has not been stable; it has increased manifold.  Due to this constant changing population, the subject of demographics, the statistics of how many people there are in a given population, was created.  Demography can also be defined as the study of populations, and the factors that cause the most amount of population growth or decline.  The main measurements of demography include: birth rates, death rates, sex ratios, life expectancy, and migration rates.  All of these measures are found by a series of surveys and censuses conducted over a time period in order to compare how the population is changing.  Other ways to measure population demographics include the use of historical maps, aerial photographs, and census statistics.  One of the reasons why demographers use statistics about population change is because of the social and demographic transformations that the world experiences; significant challenges for the government and businesses will take effect depending on the degree of the population change.

Panzer Grenadier series: The Panzer Grenadier series of board wargames is Avalanche Press's series of World War II tactical land combat.  The first game in the series was released in 2000.

Supporting paragraphs: Panzer Grenadier series World War II
Answer: 1939 to 1945