The dutch have lost to mayor colonies, indonesia and south africa. During the war with England for Soth Africa Holland di not have many inhabitants and did have a good army.
During the indonesian independents war the Indonesians used guerrilla tatics to overwelm the small dutch forces. The Japanse invasion had match to do with this, many dutch people where killed and the dutch forces had to go to holland to defend it against nazi germany. After the war Holland tried to hold it but with little succes and with international pressure the left Indonesia.