One explanation for the extraordinary prosperity of the Tang Dynasty might have been

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.

during world war ii, the united states officially had no propaganda, but the roosevelt government used means to circumvent this official line. one such propaganda tool was the publicly owned but government-funded writers' war board (wwb).

explanation: