▁of ▁F ris ia ▁was ▁unable ▁to ▁assist , ▁that ▁province ▁and ▁G ron ingen ▁being ▁attacked ▁by ▁Bern hard ▁von ▁Gal en , ▁bishop ▁of ▁Mün ster . ▁However ▁a ▁sudden ▁storm ▁prevent ed ▁a ▁battle . ▁On ▁ 7 ▁June , ▁the ▁wind ▁blow ing ▁from ▁the ▁north west , ▁Ru pert ▁tried ▁again ▁and ▁arranged ▁his ▁own ▁squad ron ▁of ▁the ▁Red ▁in ▁the ▁van , ▁the ▁French ▁squad ron ▁of ▁the ▁White ▁commanded ▁by ▁Jean ▁II ▁d ' E str ées ▁in ▁the ▁centre , ▁and ▁Sir ▁Edward ▁Sp rag ge ' s ▁squad ron ▁of ▁the ▁Blue ▁in ▁the ▁rear . ▁The ▁Dutch ▁van ▁was ▁commanded ▁by ▁T rom p , ▁the ▁centre ▁by ▁Lieutenant - Ad mir al ▁A ert ▁J ans se ▁van ▁N es ▁under ▁direct ▁super vision ▁of ▁De ▁R uy ter ▁himself ▁and ▁the ▁rear ▁by ▁Lieutenant - Ad mir al ▁Ad ria en ▁Ban ck ert . ▁ ▁Ru pert , ▁convinced ▁that ▁the ▁smaller ▁Dutch ▁fleet ▁would ▁withdraw ▁to ▁H elle vo ets l uis ▁when ▁pressed , ▁det ached ▁a ▁special ▁squad ron ▁at ▁nine ▁in ▁the ▁morning ▁to ▁cut ▁off ▁the ▁retre ating ▁Dutch ▁from ▁the ▁north . ▁In ▁this ▁task force ▁he ▁concentr ated ▁all ▁l ighter ▁ships ▁from ▁the ▁regular ▁squad rons ▁so ▁that ▁it ▁would ▁be ▁able ▁to ▁man oe uv re ▁more ▁easily ▁over ▁the ▁sho als . ▁However , ▁De ▁R uy ter ▁did ▁not ▁bud ge . ▁When ▁however ▁the ▁squad ron ▁at