On 03 Jun 1665 at the Battle of Lowestoft an English fleet commanded by King James II of England Scotland and Ireland (age 31), Prince Rupert Palatinate Simmern 1st Duke Cumberland (age 45) and Edward Montagu 1st Earl Sandwich (age 39) defeated a Dutch Fleet.

Richard Boyle was killed.

Charles Maccarthy Viscount Muskerry was killed.

Charles Berkeley 1st Earl Falmouth (age 35) was killed by a cannonball aboard the Royal Charles. Earl Falmouth extinct, Baron Botetourt Langport in Somerset extinct. His father Charles Berkeley 2nd Viscount Fitzhardinge (age 65) succeeded 2nd Viscount Fitzhardinge of Berehaven in Kerry. Penelope Godolphin Viscountess Fitzhardinge by marriage Viscountess Fitzhardinge of Berehaven in Kerry. Possibly the only occasion when a father has succeeded his son.

Charles Weston 3rd Earl of Portland (age 26) was killed by a cannon shot. On 13 Jun 1665 His uncle Thomas Weston 4th Earl of Portland (age 55) succeeded 4th Earl of Portland.

Thomas Allin 1st Baronet (age 53) was present.

Admiral Jeremy Smith commanded the Mary.

Captain George Batts fought. He was assigned to Sir George Ayscue's (age 49) division in the Blue Squadron.

James Ley 3rd Earl Marlborough (age 47) was killed at the Battle of Lowestoft commanding Old James attempting to recover a captured ship. His half brother William Ley 4th Earl Marlborough (age 53) succeeded 4th Earl Marlborough.