Rubuta ci gaba don wannan sakin layi - Lokacin da Sarki Frederick II ya yi sarauta a 1559, nan da nan ya fara fadada rundunar sojan ruwa. Yawan sansanonin, yadudduka da jiragen ruwa sun karu da sauri kuma an yi amfani da albarkatu masu yawa don sababbin kayayyaki, makamai, horo da dabarun yaƙi. Sweden, wadda ta zama ƙasa mai zaman kanta, ta mamaye babban ɓangaren Tekun Baltic kuma ta yi barazana ga bukatun 'yan kasuwa na Danish. A cikin ramuwar gayya, Denmark ta rufe Øresund a cikin 1568, tana shimfida iri na farko don Yaƙin Scanian (1675<unk>1679), shekaru takwas kawai bayan ƙarshen Yaƙin Nordic na biyu (1657<unk>1660), wanda Denmark ta rasa lardunan Sweden na yanzu na "Skåne", "Halland" da "Blekinge". A wannan lokacin, an ba da ƙarin albarkatu ga rundunar sojan ruwa. Cort Adeler da Niels Juel sun jagoranci sojojin ruwa na Danish zuwa nasara a yakin Køge Bay
a shekara ta 1677.