Rubuta ci gaba don wannan sakin layi - A shekara ta 1672, Yaƙin Franco-Dutch ya ɓarke, tare da Brandenburg-Prussia da ke da alaƙa da Jamhuriyar Holland. Wannan kawancen ya dogara ne akan yarjejeniyar 1669, kuma ya haifar da mamayar Faransa na Brandenburg-Prussian Cleves. A watan Yunin 1673, Frederick William ya yi watsi da kawancen Dutch kuma ya kulla yarjejeniyar tallafi tare da Faransa, wanda a biyun ya janye daga Cleves. Lokacin da Daular Roma Mai Tsarki ta ayyana yaƙi da Faransa, abin da ake kira "Reichskrieg", Brandenburg-Prussia ta sake canza bangarorin kuma ta shiga sojojin mulkin mallaka. Faransa ta matsa wa abokanta Sweden don ta sauƙaƙe ta ta hanyar kai hari kan Brandenburg-Prussia daga arewa. Charles XI na Sweden, wanda ya dogara da tallafin Faransa, ya mamaye Uckermark na Brandenburg a shekara ta 1674, yana fara wasan kwaikwayon Jamus na Scanian War (Brandenburg-Swedish War). Frederick William ya amsa da sauri ta hanyar yin tafiya da rundunarsa daga Rhine zuwa arewacin Brandenburg, kuma ya ci karo da sojojin Sweden, wanda ke kan hanyar hayewa, a cikin yakin Fehrbellin
(1675). (Ka duba kuma. Ko da yake ƙaramin faɗa ne daga mahangar soja, nasarar Frederick William ta zama babbar alama ce. "Babban Zaɓi" ya fara kai hare-hare, yana bin sojojin Sweden da ke janyewa ta hanyar Swedish Pomerania.