Based on the Coast Guard Historian’s timeline, https://www.history.uscg.mil/research/chronology/
With inspiration from Mike Kelso

July 4

1979  While on a 10-week cadet cruise CGC Ingham located the 75-foot Honduran fishing trawler Mary Ann about 500 miles southwest of San Juan, Puerto Rico.  A boarding team seized the trawler after they discovered 15-tons of marijuana aboard.  The Mary Ann first attempted to evade the boarding and actually rammed Ingham, causing some damage to the cutter.  The trawler finally hove to after Ingham fired a number of warning shots.

136 Haitian refugees on the flight deck of the US Coast Guard cutter Harriet Lane

1994  Cutters assigned to Operation Able Manner, which commenced under presidential order on January 15, 1994, rescued 3,247 Haitian migrants from 70 grossly overloaded sailboats in the Windward Passage.  They rescued a total of 15,955 during the month of July 1994.