In high latitude climates, are common

The answer is subarctic

A latitude is a measure of position north or south of the equator. On the equator, the latitude is 0 degrees, and on the poles, it is 90 degrees. The high-latitude climates are in high latitudes, thus on the poles. the subarctic climate spreads between 50 and 70 degrees of latitude, thus, it belongs to the high-latitude climate.

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In high latitude climates, severe cold climates are common.

the roman republic began to expand when rome fought the punic wars and defeated carthage. the punic wars refer to the series of 3 wars fought among rome and carthage, before it ended in carthage's defeat.