宣戦布告sensenfukokuni至るまでitarumadeno時期jikihaこのようなkonoyouna状況joukyouであったdeattato言えるieru
You can say that the circumstances were thus in the period leading up to the declaration of war.

© Based on JMdict, KANJIDIC2, and JMnedict, property of the Electronic Dictionary Research and Development Group, used in conformance with the Group's licence. Example sentences from the Tatoeba project (CC BY 2.0). Kanji stroke order data from the KanjiVG project by Ulrich Apel (CC BY-SA 3.0). See comprehensive list of data sources for more info.

Search other dictionaries for 宣戦布告に至るまでの時期はこのような状況であったと言える。:
Yahoo!辞書 / goo辞書 / alc.co.jp / Weblio / Wiktionary