Is There a General Trend in Constitutional Democracies Toward Parliamentary Control Over War-and-Peace Decisions?

My hypothesis is that there is a general trend toward subordinating war powers to constitutional control, and that this trend includes a subtrend toward greater parliamentary control over the decision to introduce troops into situations of actual or potential hostilities. UN peace operations present one variant of a recurring problem for constitutional democracies, as do collective security and collective enforcement operations under the auspices of the United Nations or a regional body such as the North Atlantic Treaty Organization (NATO)