Which years encompassed Operation DESERT SHIELD and DESERT STORM?

The years that encompassed Operation DESERT SHIELD and DESERT STORM are indeed 1990 and 1991. Operation DESERT SHIELD began in August 1990, following Iraq's invasion of Kuwait, as allied forces gathered to defend Saudi Arabia and prepare for a potential ground offensive. Operation DESERT STORM commenced on January 17, 1991, marking the launch of air and ground attacks aimed at liberating Kuwait from Iraqi occupation, which ultimately concluded in late February 1991 when Kuwait was successfully liberated.

The correct timeframe of 1990-1991 aligns with these significant military operations, emphasizing the rapid mobilization and execution of the coalition forces’ strategic objectives in response to Iraq's aggression. The other options extend beyond the actual periods of these operations or do not adequately capture their timeline.