The phrase "was required" indicates a mandatory action that must be taken. Some synonyms for this phrase include "obliged", "compelled", "mandated", "necessary", and "requisite". When something is required, it can also be described as "essential", "vital", "needed", or "indispensable". In some cases, certain actions may be "imperative", "critical", or "crucial". Other synonyms include "demanding", "urgent", or "pressing". The use of synonyms adds variety to your writing and helps to avoid repetition. By incorporating these synonyms, you can enrich the language of your communication and express yourself more clearly and effectively.