Concentration of force in this scenario requires mobility (to permit rapid concentration) and power (to be effective in combat once concentrated).

The company once concentrated its media budget almost entirely in traditional outlets like television.

Many writers of history who once concentrated on different eras have switched their attention to the founding fathers.

Although unions once concentrated primarily on organizing individual work sites, many now take a broader approach, sometimes aiming recruitment at entire communities.

Auto makers that once concentrated on building leaner, more efficient models have instead been adding the muscle that customers crave.

Mr. Fitzgerald's law practice once concentrated on medical malpractice, particularly cases of infants injured during delivery.

Poverty, once concentrated in large housing projects and institutions and invisible to "normal" America, is now in plain sight in the city streets.

For an instant, changing gears, his features relaxed, then concentrated with attention once again.

Religious conservatives who once concentrated on school boards and other local races are looking at higher offices as they try to pull the Republican Party to the right.

At Rovaniemi the Germans initially concentrated mainly on destroying governmental buildings but once fire got loose they were forced to destroy several more.