Armenia reached its zenith during the reign of Gagik.

That infighting reached a crescendo during the reign of Donald Rumsfeld at the Pentagon.

Schwarzenberg reached the height of his power during the reign of Elector George William.

The Alani guard reached its peak during the reign of Tugh Temür and their number expanded to 30,000.

Trebizond had reached its greatest wealth and influence during the long reign of Alexios II (1297-1330).

This art form reached the height of its popularity during the reign of Suleiman the Magnificent (1520-66).

The Spanish Empire reached its height during the reign of Philip II.

The monarchy reached its peak during the 17th century and the reign of Louis XIV.

Mughal cannon production reached its zenith during the reign of Aurangzeb.

It reached its greatest expanse during the reign of Trajan (98-117 AD).