What are settling tanks for?

Who made propaganda posters? Who won the battle of raisin river? What do you call brave people? What was significant about the Attack on Fort Sumter? What does the saying 'one if by land two if by sea' mean? What kind of weapons were used during World War 2? How many battleships and aircraft carriers were sunk during world war 2? How many Japanese Americans were interred in 1942? Why would it be impossible for the south to win a sustained war with the north? How did Midway Island got its name? Which two union states were separated from the rest of the country? How many stripes does a sergeant have on his arm? When did Germany become involved in World War 2? Was the Vietnam war pointless? How did American entry into world war 1 affect germanys stragety? What year was it after World War 2 was over? What occurred in Washington after the march? What was the aftermath of D-Day? What symbol is in the middle of the Afghanistan flag? What is America taking a step toward war in 1941?

What are settling tanks for?