Based on the map what fraction or percentage of Europe and North Africa was initially controlled by the Axis powers in 1939 and what was the
change by 1942?

The Axis controlled most of Northern Africa: from Morocco to Libya, however, they never controlled Eygpt, which was kept under British Control.

In East Africa, Italy was developing a colonial empire: it controlled Ethiopia, Eritrea, Djibouit and Somalia. However, and this was a major change by 1942, the British conquered a portion of Somalia that was later known as the "British Somaliland".

By 1942, allied troops were advancing in Morocco and Algeria, while Axis troops, mostly German, were landing in Tunisia.

This campaign and the axis control of Northern Africa would only end in the following year: 1943.

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.

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