If there is an incursion into a country, enemy soldiers suddenly enter it.
例句
...armed incursions into border areas by rebel forces.叛軍武裝入侵邊境地區
N-COUNT
涌入;侵入;傳入
If someone or something enters an area where you would not expect them to be, or where they have not been found before, you can call this an incursion, especially when you disapprove of their presence.
例句
Traditional crafts remain remarkably unchanged by the slow incursion of modern ways.傳統工藝繼續保持原有的特色,沒有因現代化手段的緩慢引入而改變。...her disastrous incursion into the property market.她非常不明智地轉入房地產市場
英漢詞典釋義
n.
襲擊, 侵入, 侵犯
Enemy forces have made incursions into our territory.敵軍已入侵我國領土。
英英詞典釋義
Noun
1. the act of entering some territory or domain (often in large numbers);
"the incursion of television into the American livingroom"