Geesiena Jacoba "Sienie" Strikwerda (née van Klinken; 7 November 1921 – 23 June 2013) was a Dutch educator, feminist, and anti–nuclear weapons activist.

The group marched to the Binnenhof, the seat of the States General of the Netherlands, and Strikwerda climbed on a vehicle to address the crowd.

[4][5] A better organisational structure was needed, and in 1982,[6] the Komitee Kruisraketten Nee (Committee Cruise Missiles No [nl]) was established with Strikwerda as chairperson.

After the demonstration, the doors at Den Haag Centraal railway station were kept closed and people were let in piecemeal to prevent overcrowding.

[10] Prime Minister Ruud Lubbers announced on television that decisions were not made by the size of a demonstration, but by the majority in parliament.

[2] Despite strong opposition against nuclear weapons, the government decided to place the cruise missiles, but with a two-year delay.

[3] On 8 December 1987, the Intermediate-Range Nuclear Forces Treaty was signed which resulted in a cancellation of the cruise missiles in the Netherlands.