Definition and Context:
Strategic defense refers to the planning and implementation of measures to protect a nation, community, or individual from potential threats or attacks. In biblical times, strategic defense encompassed both physical and spiritual dimensions, involving fortifications, military tactics, and reliance on divine protection.

Biblical Examples:

1. Nehemiah's Wall:
Nehemiah's leadership in rebuilding the walls of Jerusalem is a prime example of strategic defense. Faced with opposition from surrounding enemies, Nehemiah organized the people to work with one hand and hold a weapon with the other (Nehemiah 4:17-18). This dual approach of construction and defense highlights the importance of preparedness and vigilance.

2. David's Military Strategies:
King David, known for his military prowess, often sought God's guidance in battle. In 2 Samuel 5:23-25 , David inquired of the Lord before engaging the Philistines, and God provided a specific strategy that led to victory. David's reliance on divine direction underscores the spiritual aspect of strategic defense.

3. Hezekiah's Preparations:
King Hezekiah fortified Jerusalem against the Assyrian threat by strengthening the city's defenses and securing the water supply (2 Chronicles 32:2-5). Hezekiah's actions demonstrate the importance of practical measures in conjunction with faith, as he also encouraged the people to trust in the Lord for deliverance (2 Chronicles 32:7-8).

Spiritual Defense:

1. The Armor of God:
The Apostle Paul, in Ephesians 6:10-18 , describes the "armor of God" as essential for spiritual defense against the schemes of the devil. This metaphorical armor includes truth, righteousness, the gospel of peace, faith, salvation, the Word of God, and prayer. Believers are called to be vigilant and equipped for spiritual warfare.

2. Prayer and Watchfulness:
Jesus emphasized the importance of prayer and watchfulness as a form of strategic defense. In Matthew 26:41 , He instructed His disciples to "watch and pray so that you will not enter into temptation." This highlights the need for spiritual alertness and reliance on God's strength.

Principles of Strategic Defense:

1. Preparation and Planning:
Proverbs 21:31 states, "The horse is prepared for the day of battle, but victory is of the LORD." This verse illustrates the balance between human preparation and divine intervention. Strategic defense involves careful planning while acknowledging God's ultimate control over outcomes.

2. Community and Cooperation:
The rebuilding of Jerusalem's walls under Nehemiah involved the cooperation of the entire community (Nehemiah 3). Strategic defense often requires collective effort and unity, as seen in the biblical principle of bearing one another's burdens (Galatians 6:2).

3. Trust in God:
Throughout Scripture, trust in God is paramount in strategic defense. Psalm 20:7 declares, "Some trust in chariots and others in horses, but we trust in the name of the LORD our God." This trust is not passive but active, involving obedience and faithfulness to God's commands.

Conclusion:
Strategic defense in the Bible encompasses both physical and spiritual dimensions, requiring preparation, cooperation, and unwavering trust in God. Through historical examples and spiritual teachings, Scripture provides a comprehensive framework for understanding and implementing strategic defense in various contexts.